Squashed update of kernel from 3.4.70 to 3.4.71

Conflicts:
	arch/powerpc/kernel/signal_32.c
	arch/powerpc/platforms/powernv/pci-ioda.c
	drivers/acpi/acpica/exoparg1.c
	drivers/acpi/acpica/exstore.c
	drivers/hwmon/lm90.c
	drivers/net/can/c_can/c_can.c
	drivers/net/wireless/libertas/debugfs.c
	drivers/net/wireless/rt2x00/rt2x00mac.c
	fs/configfs/dir.c
	fs/exec.c
	fs/nfs/nfs4proc.c
	fs/nfs/nfs4state.c
	fs/nfsd/vfs.c
	fs/proc/inode.c