drm/amd/display: remove redundant null check of array 'data'

The null check on aconnector->base.edid_blob_ptr->data is redundant
since data is an array and can never be null. Remove it.

Detected by CoverityScan, CID#1460369 ("Array compared against 0")

Acked-by: Christian König <[e-mail]>
Reviewed-by: Harry Wentland <[e-mail]>
Signed-off-by: Colin Ian King <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 	};
 	struct edid *edid;
 
-	if (!aconnector->base.edid_blob_ptr ||
-		!aconnector->base.edid_blob_ptr->data) {
+	if (!aconnector->base.edid_blob_ptr) {
 		DRM_ERROR("No EDID firmware found on connector: %s ,forcing to OFF!\n",
 				aconnector->base.name);