Add CROSS_COMPILE setting

Change-Id: I217fa307f7c6ea63d10e13588b65017b785c09b1
diff --git a/debian/rules b/debian/rules
index 629b4c2..f92979f 100755
--- a/debian/rules
+++ b/debian/rules
@@ -10,7 +10,7 @@
 	dh $@
 
 override_dh_auto_build:
-	dh_auto_build -- mx8mq_phanbell_defconfig _all
+	dh_auto_build -- CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm mx8mq_phanbell_defconfig _all
 
 	objcopy -I binary -O binary --pad-to 0x4000 --gap-fill 0x0 $(IMX_FIRMWARE_DIR)/lpddr4_pmu_train_1d_dmem.bin lpddr4_pmu_train_1d_dmem_pad.bin
 	objcopy -I binary -O binary --pad-to 0x8000 --gap-fill 0x0 $(IMX_FIRMWARE_DIR)/lpddr4_pmu_train_1d_imem.bin lpddr4_pmu_train_1d_imem_pad.bin