Revert "net: drop nopreempt requirement on sock_prot_inuse_add()"

This reverts commit c8f2ebbb which is
commit b3cb764a upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I5fc17d28f84609e632299f1f1210bcb895a027e6
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>