u-boot: Drop bootcmd support for legacy images

This u-boot bump contains one patch:

Brad Bishop (1):
      aspeed: Drop bootcmd support for legacy images

Rebase out of tree Witherspoon patches.

Change-Id: Ie8f4453a9d88823d7a97b9cd172089ead045024d
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/common/recipes-bsp/u-boot/u-boot-common.inc b/common/recipes-bsp/u-boot/u-boot-common.inc
index 8e278bd..0549330 100644
--- a/common/recipes-bsp/u-boot/u-boot-common.inc
+++ b/common/recipes-bsp/u-boot/u-boot-common.inc
@@ -7,7 +7,7 @@
 
 # We use the revision in order to avoid having to fetch it from the
 # repo during parse
-SRCREV = "7fb88a88d08c19b0e6f88c0a484ab001a4476a27"
+SRCREV = "e4c85cd4de96bfdff7b614731a044db11815ff0c"
 
 UBRANCH = "v2016.07-aspeed-openbmc"
 SRC_URI = "git://git@github.com/openbmc/u-boot.git;branch=${UBRANCH};protocol=https"