drm/i915: Make power well ID names more uniform

The format for the ID names is <platform>_DISP_PW_* so rename the IDs
not following this accordingly. Leave BXT_DPIO_CMN_BC as-is since we'll
change that to use another existing ID in the next patch.

v2:
- Fix line over 80 chars checkpatch warning.

Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180806095843.13294-9-imre.deak@intel.com
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 4568adc..ef1fa50 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1036,16 +1036,16 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
 enum i915_power_well_id {
 	DISP_PW_ID_NONE,
 
-	PUNIT_POWER_WELL_DISP2D,
-	PUNIT_POWER_WELL_DPIO_CMN_BC,
-	PUNIT_POWER_WELL_DPIO_CMN_D,
+	VLV_DISP_PW_DISP2D,
+	BXT_DISP_PW_DPIO_CMN_A,
+	VLV_DISP_PW_DPIO_CMN_BC,
+	GLK_DISP_PW_DPIO_CMN_C,
+	CHV_DISP_PW_DPIO_CMN_D,
 	HSW_DISP_PW_GLOBAL,
 	SKL_DISP_PW_MISC_IO,
 	SKL_DISP_PW_1,
 	SKL_DISP_PW_2,
-	BXT_DPIO_CMN_A,
 	BXT_DPIO_CMN_BC,
-	GLK_DPIO_CMN_C,
 	ICL_DISP_PW_1,
 	ICL_DISP_PW_2,
 };