Corstone700 Kernel modules build fix.

JIRA: MLBEDSW-5531
Change-Id: Ib4b6b6b0ee3995bb01029d561c4cf7eed981a303
diff --git a/kernel/CMakeLists.txt b/kernel/CMakeLists.txt
index 705a30a..5aa47bb 100644
--- a/kernel/CMakeLists.txt
+++ b/kernel/CMakeLists.txt
@@ -34,7 +34,7 @@
 
 # Build the kernel module
 add_custom_target(kernel ALL
-                  COMMAND ${CMAKE_MAKE_PROGRAM} -C ${KDIR} M=${CMAKE_CURRENT_SOURCE_DIR} CONFIG_ETHOSU=m CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 modules
+                  COMMAND ${CMAKE_MAKE_PROGRAM} -C ${KDIR} M=${CMAKE_CURRENT_SOURCE_DIR} CONFIG_ETHOSU=m CROSS_COMPILE=${CROSS_COMPILE} ARCH=${ARCH} modules
                   BYPRODUCTS ethosu.ko
                   DEPENDS ${SOURCES} Kbuild Kconfig
                   COMMENT "Building ethosu.ko"