Revert "binder_alloc: Add missing mmap_lock calls when using the VMA"

This reverts commit d6f35446.

It is coming in through Andrew's tree instead, and for some reason we
have different versions.  I trust the version from Andrew more as the
original offending commit came through his tree.

Fixes: d6f35446

 ("binder_alloc: Add missing mmap_lock calls when using the VMA")
Cc: stable <stable@kernel.org>
Cc: Ondrej Mosnacek <omosnace@redhat.com>
Cc: Ondrej Mosnacek <omosnace@redhat.com>
Cc: Carlos Llamas <cmllamas@google.com>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://lore.kernel.org/r/20220819184027.7b3fda3e@canb.auug.org.au
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>