Revert "subtree updates"

Needs to go through CI

This reverts commit fc7e7973f3119e2bad511209aa336537dc5ffbed.
diff --git a/meta-arm/meta-arm-bsp/recipes-bsp/external-system/external-system_0.1.0.bb b/meta-arm/meta-arm-bsp/recipes-bsp/external-system/external-system_0.1.0.bb
index 18649ce..8b09ab0 100644
--- a/meta-arm/meta-arm-bsp/recipes-bsp/external-system/external-system_0.1.0.bb
+++ b/meta-arm/meta-arm-bsp/recipes-bsp/external-system/external-system_0.1.0.bb
@@ -9,12 +9,11 @@
                     file://cmsis/LICENSE.txt;md5=e3fc50a88d0a364313df4b21ef20c29e"
 
 SRC_URI = "gitsm://git.gitlab.arm.com/arm-reference-solutions/corstone1000/external_system/rtx.git;protocol=https;branch=master \
-           file://0001-tools-gen_module_code-atomically-rewrite-the-generat.patch"
+           file://race.patch"
 SRCREV = "8c9dca74b104ff6c9722fb0738ba93dd3719c080"
-PV .= "+git"
+PV .= "+git${SRCPV}"
 
 COMPATIBLE_MACHINE = "(corstone1000)"
-PACKAGE_ARCH = "${MACHINE_ARCH}"
 
 # PRODUCT is passed to the Makefile to specify the platform to be used.
 PRODUCT = "corstone-1000"