drm/i915: Make IS_BROXTON only take dev_priv

Saves 1392 bytes of .rodata strings.

Also change a few function/macro prototypes in i915_gem_gtt.c
from dev to dev_priv where it made more sense to do so.

v2: Add parantheses around dev_priv. (Ville Syrjala)
v3: Mention function prototype changes. (David Weinehall)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: David Weinehall <david.weinehall@linux.intel.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Jani Nikula <jani.nikula@linux.intel.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: David Weinehall <david.weinehall@linux.intel.com>
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 1a2b3be..e07c344 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -600,7 +600,7 @@
  * the given connectors.
  */
 
-static bool intel_PLL_is_valid(struct drm_device *dev,
+static bool intel_PLL_is_valid(struct drm_i915_private *dev_priv,
 			       const struct intel_limit *limit,
 			       const struct dpll *clock)
 {
@@ -613,12 +613,13 @@
 	if (clock->m1  < limit->m1.min  || limit->m1.max  < clock->m1)
 		INTELPllInvalid("m1 out of range\n");
 
-	if (!IS_PINEVIEW(dev) && !IS_VALLEYVIEW(dev) &&
-	    !IS_CHERRYVIEW(dev) && !IS_BROXTON(dev))
+	if (!IS_PINEVIEW(dev_priv) && !IS_VALLEYVIEW(dev_priv) &&
+	    !IS_CHERRYVIEW(dev_priv) && !IS_BROXTON(dev_priv))
 		if (clock->m1 <= clock->m2)
 			INTELPllInvalid("m1 <= m2\n");
 
-	if (!IS_VALLEYVIEW(dev) && !IS_CHERRYVIEW(dev) && !IS_BROXTON(dev)) {
+	if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv) &&
+	    !IS_BROXTON(dev_priv)) {
 		if (clock->p < limit->p.min || limit->p.max < clock->p)
 			INTELPllInvalid("p out of range\n");
 		if (clock->m < limit->m.min || limit->m.max < clock->m)
@@ -698,7 +699,8 @@
 					int this_err;
 
 					i9xx_calc_dpll_params(refclk, &clock);
-					if (!intel_PLL_is_valid(dev, limit,
+					if (!intel_PLL_is_valid(to_i915(dev),
+								limit,
 								&clock))
 						continue;
 					if (match_clock &&
@@ -753,7 +755,8 @@
 					int this_err;
 
 					pnv_calc_dpll_params(refclk, &clock);
-					if (!intel_PLL_is_valid(dev, limit,
+					if (!intel_PLL_is_valid(to_i915(dev),
+								limit,
 								&clock))
 						continue;
 					if (match_clock &&
@@ -813,7 +816,8 @@
 					int this_err;
 
 					i9xx_calc_dpll_params(refclk, &clock);
-					if (!intel_PLL_is_valid(dev, limit,
+					if (!intel_PLL_is_valid(to_i915(dev),
+								limit,
 								&clock))
 						continue;
 
@@ -909,7 +913,8 @@
 
 					vlv_calc_dpll_params(refclk, &clock);
 
-					if (!intel_PLL_is_valid(dev, limit,
+					if (!intel_PLL_is_valid(to_i915(dev),
+								limit,
 								&clock))
 						continue;
 
@@ -977,7 +982,7 @@
 
 			chv_calc_dpll_params(refclk, &clock);
 
-			if (!intel_PLL_is_valid(dev, limit, &clock))
+			if (!intel_PLL_is_valid(to_i915(dev), limit, &clock))
 				continue;
 
 			if (!vlv_PLL_is_optimal(dev, target, &clock, best_clock,
@@ -5850,7 +5855,7 @@
 			max_cdclk = 308571;
 
 		dev_priv->max_cdclk_freq = skl_calc_cdclk(max_cdclk, vco);
-	} else if (IS_BROXTON(dev)) {
+	} else if (IS_BROXTON(dev_priv)) {
 		dev_priv->max_cdclk_freq = 624000;
 	} else if (IS_BROADWELL(dev_priv))  {
 		/*
@@ -10648,7 +10653,7 @@
 
 	if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
 		skylake_get_ddi_pll(dev_priv, port, pipe_config);
-	else if (IS_BROXTON(dev))
+	else if (IS_BROXTON(dev_priv))
 		bxt_get_ddi_pll(dev_priv, port, pipe_config);
 	else
 		haswell_get_ddi_pll(dev_priv, port, pipe_config);
@@ -12806,7 +12811,7 @@
 	DRM_DEBUG_KMS("ips: %i\n", pipe_config->ips_enabled);
 	DRM_DEBUG_KMS("double wide: %i\n", pipe_config->double_wide);
 
-	if (IS_BROXTON(dev)) {
+	if (IS_BROXTON(dev_priv)) {
 		DRM_DEBUG_KMS("dpll_hw_state: ebb0: 0x%x, ebb4: 0x%x,"
 			      "pll0: 0x%x, pll1: 0x%x, pll2: 0x%x, pll3: 0x%x, "
 			      "pll6: 0x%x, pll8: 0x%x, pll9: 0x%x, pll10: 0x%x, pcsdw12: 0x%x\n",
@@ -15399,7 +15404,7 @@
 	if (intel_crt_present(dev))
 		intel_crt_init(dev);
 
-	if (IS_BROXTON(dev)) {
+	if (IS_BROXTON(dev_priv)) {
 		/*
 		 * FIXME: Broxton doesn't support port detection via the
 		 * DDI_BUF_CTL_A or SFUSE_STRAP registers, find another way to