kernel: Adjust the kernel source tree path to match

Change-Id: I8bcb89bcc62e2519ecf28948a89df5b5d08e9d18
diff --git a/kernel.mk b/kernel.mk
index fc61cbb..1c9e28b 100644
--- a/kernel.mk
+++ b/kernel.mk
@@ -5,7 +5,7 @@
 include $(ROOTDIR)/build/preamble.mk
 
 # Kernel directories
-KERNEL_SRC_DIR := $(ROOTDIR)/hardware/bsp/kernel/nxp/imx-v4.9
+KERNEL_SRC_DIR := $(ROOTDIR)/linux-imx
 KERNEL_OUT_DIR := $(PRODUCT_OUT)/obj/KERNEL_OBJ
 
 # Explicit sequencing here since u-boot and the kernel seriously hate each other
diff --git a/preamble.mk b/preamble.mk
index cae5c70..316db1f 100644
--- a/preamble.mk
+++ b/preamble.mk
@@ -2,7 +2,7 @@
 # common header where useful global vars go.
 
 # Globally useful directories
-TOOLCHAIN := $(ROOTDIR)/prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin/aarch64-linux-android-
+TOOLCHAIN := $(ROOTDIR)/toolchain/bin/aarch64-linux-android-
 
 # Used by debootstrap and rootfs both
 DEBOOTSTRAP_TARBALL := $(ROOTDIR)/cache/debootstrap.tgz