KVM: PPC: Book3S HV: Fix compilation with unusual configurations

This adds the "again" parameter to the dummy version of
kvmppc_check_passthru(), so that it matches the real version.
This fixes compilation with CONFIG_BOOK3S_64_HV set but
CONFIG_KVM_XICS=n.

This includes asm/smp.h in book3s_hv_builtin.c to fix compilation
with CONFIG_SMP=n.  The explicit inclusion is necessary to provide
definitions of hard_smp_processor_id() and get_hard_smp_processor_id()
in UP configs.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

arch/powerpc/kvm/book3s_hv_builtin.c

@@ -28,6 +28,7 @@
 #include <asm/io.h>
 #include <asm/asm-prototypes.h>
 #include <asm/opal.h>
+#include <asm/smp.h>
 
 #define KVM_CMA_CHUNK_ORDER	18
 
@@ -364,7 +365,7 @@ static int kvmppc_check_passthru(u32 xisr, __be32 xirr, bool *again)
 }
 
 #else
-static inline int kvmppc_check_passthru(u32 xisr, __be32 xirr)
+static inline int kvmppc_check_passthru(u32 xisr, __be32 xirr, bool *again)
 {
 	return 1;
 }