IB: Replace EXTRA_CFLAGS with ccflags-y

Signed-off-by: matt mooney <mfm@muteddisk.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/ipath/Makefile

@@ -1,4 +1,4 @@
-EXTRA_CFLAGS += -DIPATH_IDSTR='"QLogic kernel.org driver"' \
+ccflags-y := -DIPATH_IDSTR='"QLogic kernel.org driver"' \
 	-DIPATH_KERN_TYPE=0
 
 obj-$(CONFIG_INFINIBAND_IPATH) += ib_ipath.o