KVM: PPC: Fix SREGS documentation reference

Reflect the uapi folder change in SREGS API documentation.
Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
Reviewed-by: Amos Kong <kongjianjun@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

Documentation/virtual/kvm/api.txt

@@ -345,7 +345,7 @@ struct kvm_sregs {
 	__u64 interrupt_bitmap[(KVM_NR_INTERRUPTS + 63) / 64];
 };
 
-/* ppc -- see arch/powerpc/include/asm/kvm.h */
+/* ppc -- see arch/powerpc/include/uapi/asm/kvm.h */
 
 interrupt_bitmap is a bitmap of pending external interrupts.  At most
 one bit may be set.  This interrupt has been acknowledged by the APIC