Revert "Staging: android: binder: More offset validation."

This reverts commit 35cbe09b356b5a412e9e8e1895a5a8d60331ff48.
Revert "n_tty: Fix n_tty_write crash when echoing in raw mode"

This reverts commit f40ff7238fa934f6a18fb25b1ffca449f81dda32.