Revert "block: reject invalid operation in submit_bio_noacct"

This reverts commit 3bf71a93 which is
commit 1c042f8d 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: If72194d8d3366b932f2c8e37d33c7be319a82ea8
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>