uboot-mediatek: fix extraneous right parens

Fixes following warning:

 Makefile:310: extraneous text after 'ifeq' directive

Signed-off-by: Petr Štetiar <[email protected]>

package/boot/uboot-mediatek/Makefile

@@ -291,7 +291,7 @@ endef
 
 define Build/Compile
 	$(call Build/Compile/U-Boot)
-ifeq ($(UBOOT_IMAGE),u-boot.fip))
+ifeq ($(UBOOT_IMAGE),u-boot.fip)
 	$(call Build/fip-image)
 endif
 endef