KVM: PPC: BookE: Load the lower half of MSR

This was preventing the guest from setting any bits in the
hardware MSR which aren't forced on, such as MSR[SPE].

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

diff --cc arch/powerpc/kvm/booke_interrupts.S
Simple merge