KVM: PPC: Book3S HV: sparse: prototypes for functions called from assembler

A bunch of KVM functions are only called from assembler.
Give them prototypes in asm-prototypes.h
This reduces sparse warnings.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

arch/powerpc/kvm/book3s_hv_ras.c

@@ -16,6 +16,7 @@
 #include <asm/machdep.h>
 #include <asm/cputhreads.h>
 #include <asm/hmi.h>
+#include <asm/asm-prototypes.h>
 
 /* SRR1 bits for machine check on POWER7 */
 #define SRR1_MC_LDSTERR		(1ul << (63-42))