drm/i915/bxt: Rename broxton to bxt in PHY/CDCLK function prefixes

Rename these remaining function prefixes to better align with the
corresponding SKL functions.

No functional change.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 7e91881..e856d49 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -2401,7 +2401,7 @@
 
 	mutex_unlock(&power_domains->lock);
 
-	broxton_init_cdclk(dev_priv);
+	bxt_init_cdclk(dev_priv);
 
 	gen9_dbuf_enable(dev_priv);
 
@@ -2418,7 +2418,7 @@
 
 	gen9_dbuf_disable(dev_priv);
 
-	broxton_uninit_cdclk(dev_priv);
+	bxt_uninit_cdclk(dev_priv);
 
 	/* The spec doesn't call for removing the reset handshake flag */