drm/amd/display: fix static checker warning

This patch fixes static checker warning of
"warn: cast after binop" introduced by
56087b31 drm/amd/display: fix high part address in dm_plane_helper_prepare_fb()

Signed-off-by: Shirish S <shirish.s@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -3001,7 +3001,7 @@ static int dm_plane_helper_prepare_fb(struct drm_plane *plane,
 							= lower_32_bits(afb->address);
 			plane_state->address.video_progressive.luma_addr.high_part
 							= upper_32_bits(afb->address);
-			chroma_addr = afb->address + (u64)(awidth * new_state->fb->height);
+			chroma_addr = afb->address + (u64)awidth * new_state->fb->height;
 			plane_state->address.video_progressive.chroma_addr.low_part
 							= lower_32_bits(chroma_addr);
 			plane_state->address.video_progressive.chroma_addr.high_part