merge filename and modify references to iseries/hv_call.h

Signed-off-by: Kelly Daly <kelly@au.ibm.com>
diff --git a/include/asm-ppc64/spinlock.h b/include/asm-ppc64/spinlock.h
index 14cb895..7d84fb5 100644
--- a/include/asm-ppc64/spinlock.h
+++ b/include/asm-ppc64/spinlock.h
@@ -21,7 +21,7 @@
 #include <linux/config.h>
 #include <asm/paca.h>
 #include <asm/hvcall.h>
-#include <asm/iSeries/HvCall.h>
+#include <asm/iseries/hv_call.h>
 
 #define __raw_spin_is_locked(x)		((x)->slock != 0)