Revert "staging: Fix build issues with new binder API"

This reverts commit d0bdff0d ("staging: Fix build issues with new
binder API"), because commit e38361d0 ("ARM: 8091/2: add get_user()
support for 8 byte types") has added the 64bit __get_user_asm_*
implementation.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>