u-boot: ubi: Apply patches on Aspeed only

All the UBI patches will only work against the Aspeed u-boot tree.
Use the new Aspeed override to prevent attempting to install patches
when a different tree is in use.

Tested: Built image and verified in witherspoon qemu
Change-Id: Ia82ae958927a561670257f1c60d9d29a8b303728
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/common/recipes-bsp/u-boot/u-boot-phosphor.inc b/meta-phosphor/common/recipes-bsp/u-boot/u-boot-phosphor.inc
new file mode 100644
index 0000000..da7ca40
--- /dev/null
+++ b/meta-phosphor/common/recipes-bsp/u-boot/u-boot-phosphor.inc
@@ -0,0 +1,5 @@
+require u-boot-aspeed.inc
+
+python do_configure () {
+    pass
+}