drm/amdgpu/powerplay: drop a redundant NULL check

Left over from an earlier rev of the patch.
Acked-by: Colin Ian King <colin.king@canonical.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Colin King <colin.king@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c

@@ -1469,8 +1469,6 @@ static int smu7_get_evv_voltages(struct pp_hwmgr *hwmgr)
 						table_info->vddgfx_lookup_table, vv_id, &sclk)) {
 				if (phm_cap_enabled(hwmgr->platform_descriptor.platformCaps,
 							PHM_PlatformCaps_ClockStretcher)) {
-					if (table_info == NULL)
-						return -EINVAL;
 					sclk_table = table_info->vdd_dep_on_sclk;
 
 					for (j = 1; j < sclk_table->count; j++) {