drm/amd/display: Renoir chroma viewport WA change formula

[why]
we want to increase the pte row plus 1 line if chroma viewport
height is integer multiple of the pte row height

[how]
instead of ceiling viewport height, we floor it. this allows
us to accommodate both cases: those where the chroma viewport
height is integer multiple of the pte row height and those where
it is not
Signed-off-by: Joseph Gravenor <joseph.gravenor@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c

@@ -204,8 +204,8 @@ void hubp21_set_viewport(
 			PTE_ROW_HEIGHT_LINEAR, &pte_row_height);
 
 		pte_row_height = 1 << (pte_row_height + 3);
-		pte_rows = (viewport_c->height + pte_row_height - 1) / pte_row_height;
-		patched_viewport_height = pte_rows * pte_row_height + 3;
+		pte_rows = (viewport_c->height / pte_row_height) + 1;
+		patched_viewport_height = pte_rows * pte_row_height + 1;
 	}