drm/amdgpu/display: fix vega12/20 handling in dal_asic_id.h

- Remove unused ASICREV_IS_VEGA12_p() macro
- Fix ASICREV_IS_VEGA12_P() macro to properly check against vega20

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/include/dal_asic_id.h

@@ -115,19 +115,17 @@
 /* DCE12 */
 #define AI_UNKNOWN 0xFF
 
-#define AI_VEGA20_P_A0 40
-#define ASICREV_IS_VEGA20_P(eChipRev) ((eChipRev >= AI_VEGA20_P_A0) && (eChipRev < AI_UNKNOWN))
-
 #define AI_GREENLAND_P_A0 1
 #define AI_GREENLAND_P_A1 2
 #define AI_UNKNOWN 0xFF
 
 #define AI_VEGA12_P_A0 20
+#define AI_VEGA20_P_A0 40
 #define ASICREV_IS_GREENLAND_M(eChipRev)  (eChipRev < AI_VEGA12_P_A0)
 #define ASICREV_IS_GREENLAND_P(eChipRev)  (eChipRev < AI_VEGA12_P_A0)
 
-#define ASICREV_IS_VEGA12_P(eChipRev) ((eChipRev >= AI_VEGA12_P_A0) && (eChipRev < AI_UNKNOWN))
-#define ASICREV_IS_VEGA12_p(eChipRev) ((eChipRev >= AI_VEGA12_P_A0) && (eChipRev < AI_UNKNOWN))
+#define ASICREV_IS_VEGA12_P(eChipRev) ((eChipRev >= AI_VEGA12_P_A0) && (eChipRev < AI_VEGA20_P_A0))
+#define ASICREV_IS_VEGA20_P(eChipRev) ((eChipRev >= AI_VEGA20_P_A0) && (eChipRev < AI_UNKNOWN))
 
 /* DCN1_0 */
 #define INTERNAL_REV_RAVEN_A0             0x00    /* First spin of Raven */