[SPARC64]: Make error codes available from sun4v_intr_get*().

And check for errors at call sites.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/asm-sparc64/hypervisor.h b/include/asm-sparc64/hypervisor.h
index 76a9d0f..f14992a 100644
--- a/include/asm-sparc64/hypervisor.h
+++ b/include/asm-sparc64/hypervisor.h
@@ -1238,7 +1238,7 @@
 #define HV_FAST_INTR_SETENABLED		0xa2
 
 #ifndef __ASSEMBLY__
-extern void sun4v_intr_setenabled(unsigned long sysino, unsigned long intr_enabled);
+extern unsigned long sun4v_intr_setenabled(unsigned long sysino, unsigned long intr_enabled);
 #endif
 
 /* intr_getstate()
@@ -1274,7 +1274,7 @@
 #define HV_FAST_INTR_SETSTATE		0xa4
 
 #ifndef __ASSEMBLY__
-extern void sun4v_intr_setstate(unsigned long sysino, unsigned long intr_state);
+extern unsigned long sun4v_intr_setstate(unsigned long sysino, unsigned long intr_state);
 #endif
 
 /* intr_gettarget()
@@ -1309,7 +1309,7 @@
 #define HV_FAST_INTR_SETTARGET		0xa6
 
 #ifndef __ASSEMBLY__
-extern void sun4v_intr_settarget(unsigned long sysino, unsigned long cpuid);
+extern unsigned long sun4v_intr_settarget(unsigned long sysino, unsigned long cpuid);
 #endif
 
 /* PCI IO services.