u-boot-aspeed-sdk: Share distrovars requirement between u-boot & fw-utils

Might as well have it in one place instead of duplicating it between both.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Change-Id: Id87649691c93d0dbdc08d2484ca59a85cb54a3eb
diff --git a/meta-aspeed/recipes-bsp/u-boot/u-boot-common-aspeed-sdk_2019.04.inc b/meta-aspeed/recipes-bsp/u-boot/u-boot-common-aspeed-sdk_2019.04.inc
index 7c091f3..75539c2 100644
--- a/meta-aspeed/recipes-bsp/u-boot/u-boot-common-aspeed-sdk_2019.04.inc
+++ b/meta-aspeed/recipes-bsp/u-boot/u-boot-common-aspeed-sdk_2019.04.inc
@@ -1,3 +1,5 @@
+require conf/machine/distro/include/uboot-distrovars.inc
+
 HOMEPAGE = "https://github.com/AspeedTech-BMC/u-boot"
 SECTION = "bootloaders"
 DEPENDS += "flex-native bison-native xxd-native"