u-boot-imx: Set SRCREV to autorev to pull latest revision.

.gitlab-ci @ 79bdebb9

-Subproject commit 38f959687665f05914bfd8547e3aab43956ff11d
+Subproject commit 79bdebb9592a0ba3150f6878b9731e82bfb27ff7

dynamic-layers/freescale-layer/recipes-bsp/u-boot/u-boot-imx_%.bbappend

@@ -9,8 +9,8 @@ PV = "2019.04"
 
 # Keith und Koep u-boot for imx8
 SRCBRANCH = "guf_imx_v2019.04_5.4.3_2.0.0"
-SRCREV = "6ab464afc08f6fcf8ab031d4f3c5d3662c3bcfc7"
-SRC_URI = "git://git@gitlab.com/garz-fricke/3rd-party/kuk/uboot-imx-kuk.git;protocol=ssh;branch=${SRCBRANCH} \
+SRCREV = "${AUTOREV}"
+SRC_URI = "git://git@gitlab.com/garz-fricke/3rd-party/kuk/uboot-imx-kuk.git;protocol=ssh;branch=${SRCBRANCH};nobranch=1 \
            file://add-u-boot-initial-env-target-to-Makefile.patch \
            file://remove-redundant-yyloc-global.patch \
 "