Revert "bpf: handle ldimm64 properly in check_cfg()"

This reverts commit b08acd5c which is
commit 3feb263b 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: Ic364d3f09e551f26324d7519bd97f08c9ce30542
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>