uboot-sunxi: enable parallel build

Signed-off-by: Felix Fietkau <[email protected]>

package/boot/uboot-sunxi/Makefile

@@ -18,6 +18,8 @@ PKG_MAINTAINER:=Zoltan HERPAI <[email protected]>
 PKG_LICENSE:=GPL-2.0 GPL-2.0+
 PKG_LICENSE_FILES:=Licenses/README
 
+PKG_BUILD_PARALLEL:=1
+
 PKG_BUILD_DIR:=$(KERNEL_BUILD_DIR)/$(PKG_NAME)-$(BUILD_VARIANT)/$(PKG_NAME)-$(PKG_VERSION)
 
 include $(INCLUDE_DIR)/package.mk