drm/amd/display: Fix warning comparing pointer to 0

Fix the following coccicheck warning:

./drivers/gpu/drm/amd/display/dc/dml/dsc/rc_calc_fpu.c:96:14-15: WARNING
comparing pointer to 0.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dml/dsc/rc_calc_fpu.c

@@ -93,7 +93,7 @@ static void get_qp_set(qp_set qps, enum colour_mode cm, enum bits_per_comp bpc,
 		TABLE_CASE(420, 12, min);
 	}
 
-	if (table == 0)
+	if (!table)
 		return;
 
 	index = (bpp - table[0].bpp) * 2;