staging: android: binder: Add binder_copy_to_user()

This patch adds binder_copy_to_user() to be used for copying binder
commands to user address space. This way we can abstract away the
copy_to_user() calls and add separate handling for the compat layer.

Change-Id: I6e0b4e5c1fc0828f1eb0bccbaf61ab740decaef5
Signed-off-by: Serban Constantinescu <serban.constantinescu@arm.com>
Git-commit: f5094abcf6c711120bbd0145d5454571dd845a73
Git-repo: git://linux-arm.org/linux-2.6-armdroid.git


Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>