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>

arch/mips/kernel/module.c

@@ -72,7 +72,7 @@ static int apply_r_mips_hi16(struct module *me, u32 *location, Elf_Addr v,
 	 * the carry we need to add.  Save the information, and let LO16 do the
 	 * actual relocation.
 	 */
-	n = kmalloc(sizeof *n, GFP_KERNEL);
+	n = kmalloc_obj(*n, GFP_KERNEL);
 	if (!n)
 		return -ENOMEM;