3.18-stable patches

added patches:
	fs-nfs-fix-new-compiler-warning-about-boolean-in-switch.patch
	iommu-vt-d-remove-unused-variable.patch
	mips-fix-the-build-on-jz4740-after-removing-the-custom-gpio.h.patch
	mm-init-fix-zone-boundary-creation.patch
	net-ti-cpmac-fix-compiler-warning-due-to-type-confusion.patch
	perf-avoid-horrible-stack-usage.patch