u-boot-nuvoton: split common vars into an include file

Move the common variables from u-boot-nuvoton and
u-boot-fw-utils-nuvoton into a shared include file. This matches
Aspeed's U-Boot and makes it easier to update the SRCREV.

(From meta-nuvoton rev: f2ffed2c9345f79f11aab0b78f03f8350bce0476)

Change-Id: I44407ff06d25f6ad6ae00f97b53c7db4fd60064c
Signed-off-by: Benjamin Fair <benjaminfair@google.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-nuvoton/recipes-bsp/u-boot/u-boot-nuvoton_git.bb b/meta-nuvoton/recipes-bsp/u-boot/u-boot-nuvoton_git.bb
index ea1fdbe..0bd23d0 100644
--- a/meta-nuvoton/recipes-bsp/u-boot/u-boot-nuvoton_git.bb
+++ b/meta-nuvoton/recipes-bsp/u-boot/u-boot-nuvoton_git.bb
@@ -1,19 +1,8 @@
 DESCRIPTION = "U-boot for Nuvoton NPCM7xx Baseboard Management Controller"
 
+require u-boot-common-nuvoton.inc
 require recipes-bsp/u-boot/u-boot.inc
 
 PROVIDES += "u-boot"
 
 DEPENDS += "dtc-native"
-
-LICENSE = "GPLv2+"
-LIC_FILES_CHKSUM = "file://Licenses/README;md5=a2c678cfd4a4d97135585cad908541c6"
-
-S = "${WORKDIR}/git"
-
-UBRANCH = "npcm7xx"
-SRC_URI = "git://github.com/Nuvoton-Israel/u-boot.git;branch=${UBRANCH}"
-SRCREV = "196461383f7d043f18cab3bb34dded89fba4712a"
-
-PV .= "+${UBRANCH}+"
-