drm/amdgpu/powerplay: drop a redundant NULL check

Left over from an earlier rev of the patch.

Acked-by: Colin Ian King <[e-mail]>
Cc: Dan Carpenter <[e-mail]>
Cc: Colin King <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 						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++) {