drm/radeon: fix typo in PG flags

s/CG/PG/ in the GFX powergating flag name.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 40a9b4b..04876e4 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -2391,7 +2391,7 @@
 				RADEON_CG_SUPPORT_HDP_LS |
 				RADEON_CG_SUPPORT_HDP_MGCG;
 			rdev->pg_flags = 0 |
-				/*RADEON_PG_SUPPORT_GFX_CG | */
+				/*RADEON_PG_SUPPORT_GFX_PG | */
 				RADEON_PG_SUPPORT_SDMA;
 			break;
 		case CHIP_OLAND:
@@ -2480,7 +2480,7 @@
 				RADEON_CG_SUPPORT_HDP_LS |
 				RADEON_CG_SUPPORT_HDP_MGCG;
 			rdev->pg_flags = 0;
-				/*RADEON_PG_SUPPORT_GFX_CG |
+				/*RADEON_PG_SUPPORT_GFX_PG |
 				RADEON_PG_SUPPORT_GFX_SMG |
 				RADEON_PG_SUPPORT_GFX_DMG |
 				RADEON_PG_SUPPORT_UVD |
@@ -2508,7 +2508,7 @@
 				RADEON_CG_SUPPORT_HDP_LS |
 				RADEON_CG_SUPPORT_HDP_MGCG;
 			rdev->pg_flags = 0;
-				/*RADEON_PG_SUPPORT_GFX_CG |
+				/*RADEON_PG_SUPPORT_GFX_PG |
 				RADEON_PG_SUPPORT_GFX_SMG |
 				RADEON_PG_SUPPORT_UVD |
 				RADEON_PG_SUPPORT_VCE |