drm/i915: rename VLV IOSF sideband functions logically

Rename all VLV IOSF sideband register accessor functions to
vlv_<port>_{read,write}. No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_sideband.c b/drivers/gpu/drm/i915/intel_sideband.c
index a7c4b61..d150972 100644
--- a/drivers/gpu/drm/i915/intel_sideband.c
+++ b/drivers/gpu/drm/i915/intel_sideband.c
@@ -63,7 +63,7 @@
 	return 0;
 }
 
-int valleyview_punit_read(struct drm_i915_private *dev_priv, u8 addr, u32 *val)
+int vlv_punit_read(struct drm_i915_private *dev_priv, u8 addr, u32 *val)
 {
 	int ret;
 
@@ -77,7 +77,7 @@
 	return ret;
 }
 
-int valleyview_punit_write(struct drm_i915_private *dev_priv, u8 addr, u32 val)
+int vlv_punit_write(struct drm_i915_private *dev_priv, u8 addr, u32 val)
 {
 	int ret;
 
@@ -91,7 +91,7 @@
 	return ret;
 }
 
-int valleyview_nc_read(struct drm_i915_private *dev_priv, u8 addr, u32 *val)
+int vlv_nc_read(struct drm_i915_private *dev_priv, u8 addr, u32 *val)
 {
 	int ret;
 
@@ -105,7 +105,7 @@
 	return ret;
 }
 
-u32 intel_dpio_read(struct drm_i915_private *dev_priv, int reg)
+u32 vlv_dpio_read(struct drm_i915_private *dev_priv, int reg)
 {
 	u32 val = 0;
 
@@ -115,7 +115,7 @@
 	return val;
 }
 
-void intel_dpio_write(struct drm_i915_private *dev_priv, int reg, u32 val)
+void vlv_dpio_write(struct drm_i915_private *dev_priv, int reg, u32 val)
 {
 	vlv_sideband_rw(dev_priv, DPIO_DEVFN, IOSF_PORT_DPIO,
 			DPIO_OPCODE_REG_WRITE, reg, &val);