remove unused PSW restore code
remove unused PSW restore code

	. now done in-kernel so IOPL gets restored

Change-Id: I9905d2844a4715004054a788613ff7efd02a227d

veritas-shine/minix3-rpi,veritas-shine/minix3-rpi,veritas-shine/minix3-rpi,veritas-shine/minix3-rpi,veritas-shine/minix3-rpi,veritas-shine/minix3-rpi,veritas-shine/minix3-rpi,veritas-shine/minix3-rpi