package/mtd: mtd-utils: fix fec.c build (bcopy reference)

Needs similar fix as what we already have for mtd-utils.git

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/mtd/mtd-utils/mtd.mk

@@ -99,6 +99,7 @@ $(MTD_BUILD_TARGETS): $(MTD_DIR)/.unpacked
 	$(MAKE) CFLAGS="-I. -I./include -I$(LINUX_HEADERS_DIR)/include -I$(STAGING_DIR)/usr/include $(TARGET_CFLAGS)" \
 		LDFLAGS="$(TARGET_LDFLAGS)" \
 		BUILDDIR=$(MTD_DIR) \
+		CPPFLAGS="-DNEED_BCOPY -Dbcmp=memcmp" \
 		CROSS=$(TARGET_CROSS) CC=$(TARGET_CC) LINUXDIR=$(LINUX26_DIR) WITHOUT_XATTR=1 -C $(MTD_DIR)
 
 MTD_TARGETS := $(addprefix $(TARGET_DIR)/usr/sbin/, $(MTD_TARGETS_y))