drm/i915: Give C0DRB3/C1DRB3 a _BW suffix

These are the 965g/g45/g33 specific DRB registers. Give them
a suitable suffix so we can add their counterparts for other
platforms.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210421153401.13847-4-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c

@@ -653,8 +653,8 @@ static void detect_bit_6_swizzle(struct i915_ggtt *ggtt)
 		 * banks of memory are paired and unswizzled on the
 		 * uneven portion, so leave that as unknown.
 		 */
-		if (intel_uncore_read16(uncore, C0DRB3) ==
-		    intel_uncore_read16(uncore, C1DRB3)) {
+		if (intel_uncore_read16(uncore, C0DRB3_BW) ==
+		    intel_uncore_read16(uncore, C1DRB3_BW)) {
 			swizzle_x = I915_BIT_6_SWIZZLE_9_10;
 			swizzle_y = I915_BIT_6_SWIZZLE_9;
 		}

drivers/gpu/drm/i915/i915_debugfs.c

@@ -622,9 +622,9 @@ static int i915_swizzle_info(struct seq_file *m, void *data)
 		seq_printf(m, "DDC2 = 0x%08x\n",
 			   intel_uncore_read(uncore, DCC2));
 		seq_printf(m, "C0DRB3 = 0x%04x\n",
-			   intel_uncore_read16(uncore, C0DRB3));
+			   intel_uncore_read16(uncore, C0DRB3_BW));
 		seq_printf(m, "C1DRB3 = 0x%04x\n",
-			   intel_uncore_read16(uncore, C1DRB3));
+			   intel_uncore_read16(uncore, C1DRB3_BW));
 	} else if (INTEL_GEN(dev_priv) >= 6) {
 		seq_printf(m, "MAD_DIMM_C0 = 0x%08x\n",
 			   intel_uncore_read(uncore, MAD_DIMM_C0));

drivers/gpu/drm/i915/i915_reg.h

@@ -3787,8 +3787,8 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
 #define CSHRDDR3CTL_DDR3       (1 << 2)
 
 /* 965 MCH register controlling DRAM channel configuration */
-#define C0DRB3			_MMIO(MCHBAR_MIRROR_BASE + 0x206)
-#define C1DRB3			_MMIO(MCHBAR_MIRROR_BASE + 0x606)
+#define C0DRB3_BW		_MMIO(MCHBAR_MIRROR_BASE + 0x206)
+#define C1DRB3_BW		_MMIO(MCHBAR_MIRROR_BASE + 0x606)
 
 /* snb MCH registers for reading the DRAM channel configuration */
 #define MAD_DIMM_C0			_MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5004)