linux-compulab: Pin SRC_REV to the one present at the integration date

Upstream uses AUTOREV and this causes two problems:
   - we don't know which revision has been used by which
     balenaOS release
   - automated Jenkins builds sometimes break when upstream performs changes
     and we can't easily determine the window in which the changes
     have been performed

We thus pin the SRC_REV to the revision used when the device has
been integrated with balenaOS, as per the upstream relese tag xml
and will update it when necessary or when we update the BSP to
another stable version.

Signed-off-by: Alexandru Costache <[email protected]>

layers/meta-balena-imx9/recipes-kernel/linux/linux-compulab_%.bbappend

@@ -5,6 +5,13 @@ DEPENDS += "rsync-native"
 
 SRC_URI:append = "file://0001-fix-kernel-build.patch"
 
+# Upstream uses AUTOREV, but we need to track
+# the stable release as per the release notes,
+# at the date of the present commit,
+# otherwise we won't know which exact kernel
+# revision is used by which balenaOS release
+SRCREV="77c117ac5747ea5c1afbdde8dcc5ca8b8b231e13"
+
 # Fixes issue where cryptodev module is installed
 # along with the kernel image in the initramfs
 KERNEL_PACKAGE_NAME="kernel"