treewide: Replace kmalloc with kmalloc_obj for non-scalar types

This is the result of running the Coccinelle script from
scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to
avoid scalar types (which need careful case-by-case checking), and
instead replace kmalloc-family calls that allocate struct or union
object instances:

Single allocations:	kmalloc(sizeof(TYPE), ...)
are replaced with:	kmalloc_obj(TYPE, ...)

Array allocations:	kmalloc_array(COUNT, sizeof(TYPE), ...)
are replaced with:	kmalloc_objs(TYPE, COUNT, ...)

Flex array allocations:	kmalloc(struct_size(PTR, FAM, COUNT), ...)
are replaced with:	kmalloc_flex(*PTR, FAM, COUNT, ...)

(where TYPE may also be *VAR)

The resulting allocations no longer return "void *", instead returning
"TYPE *".

Signed-off-by: Kees Cook <kees@kernel.org>

drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c

@@ -119,7 +119,7 @@ void amdgpu_pasid_free_delayed(struct dma_resv *resv,
 		return;
 	}
 
-	cb = kmalloc(sizeof(*cb), GFP_KERNEL);
+	cb = kmalloc_obj(*cb, GFP_KERNEL);
 	if (!cb) {
 		/* Last resort when we are OOM */
 		dma_fence_wait(fence, false);