[POWERPC] Make pSeries use the H_BULK_REMOVE hypervisor call

H_BULK_REMOVE lets us remove 4 entries from the MMU hash table with one
hypervisor call.  This uses it in pSeries_lpar_hpte_invalidate so we
can tear down mappings with fewer hypervisor calls.

Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/include/asm-powerpc/hvcall.h b/include/asm-powerpc/hvcall.h
index 7a50073..6097780 100644
--- a/include/asm-powerpc/hvcall.h
+++ b/include/asm-powerpc/hvcall.h
@@ -168,6 +168,7 @@
 #define H_FREE_LOGICAL_LAN	0x118
 #define H_ADD_LOGICAL_LAN_BUFFER 0x11C
 #define H_SEND_LOGICAL_LAN	0x120
+#define H_BULK_REMOVE		0x124
 #define H_MULTICAST_CTRL	0x130
 #define H_SET_XDABR		0x134
 #define H_STUFF_TCE		0x138