[PATCH] ia64: small patch for arch/ia64/lib/Makefile for xor.o

I was building 2.5 and noticed that if you have raid5 configured as
a module, then the arch/ia64/lib/xor.S would not get built (gets a
make error since c file not there).

Attached patch fixes that so xor.S gets built if raid5 is built-in
or a module.

arch/ia64/lib/Makefile

@@ -14,7 +14,12 @@ obj-y := __divsi3.o __udivsi3.o __modsi3.o __umodsi3.o			\
 obj-$(CONFIG_ITANIUM)	+= copy_page.o copy_user.o memcpy.o
 obj-$(CONFIG_MCKINLEY)	+= copy_page_mck.o memcpy_mck.o
 obj-$(CONFIG_PERFMON)	+= carta_random.o
-obj-$(CONFIG_MD_RAID5)	+= xor.o
+
+ifeq ($(CONFIG_MD_RAID5),m)
+	obj-y += xor.o
+else
+	obj-$(CONFIG_MD_RAID5)	+= xor.o
+endif
 
 IGNORE_FLAGS_OBJS =	__divsi3.o __udivsi3.o __modsi3.o __umodsi3.o \
 			__divdi3.o __udivdi3.o __moddi3.o __umoddi3.o