modify defines according to _ASM_POWERPC_ISERIES_

Signed-off-by: Kelly Daly <kelly@au.ibm.com>
diff --git a/include/asm-powerpc/iseries/hv_call.h b/include/asm-powerpc/iseries/hv_call.h
index af59cc1..e9f831c 100644
--- a/include/asm-powerpc/iseries/hv_call.h
+++ b/include/asm-powerpc/iseries/hv_call.h
@@ -20,8 +20,8 @@
  * This file contains the "hypervisor call" interface which is used to
  * drive the hypervisor from the OS.
  */
-#ifndef _HVCALL_H
-#define _HVCALL_H
+#ifndef _ASM_POWERPC_ISERIES_HV_CALL_H
+#define _ASM_POWERPC_ISERIES_HV_CALL_H
 
 #include <asm/iseries/hv_call_sc.h>
 #include <asm/iseries/hv_types.h>
@@ -110,4 +110,4 @@
 	HvCall1(HvCallBaseSendIPI, targetPaca->paca_index);
 }
 
-#endif /* _HVCALL_H */
+#endif /* _ASM_POWERPC_ISERIES_HV_CALL_H */