hikey960: Switch hikey960 to use 4.14 by default

Switch HiKey960 over to use 4.14 by default.

Change-Id: Id9f1566e75c67a8686047f4f697435e0bd15ec17
Signed-off-by: John Stultz <john.stultz@linaro.org>
diff --git a/hikey960.mk b/hikey960.mk
index 7847ff9..232150b 100644
--- a/hikey960.mk
+++ b/hikey960.mk
@@ -1,5 +1,5 @@
 ifndef TARGET_KERNEL_USE
-TARGET_KERNEL_USE=4.9
+TARGET_KERNEL_USE=4.14
 endif
 TARGET_PREBUILT_KERNEL := device/linaro/hikey-kernel/Image.gz-dtb-hikey960-$(TARGET_KERNEL_USE)
 TARGET_PREBUILT_DTB := device/linaro/hikey-kernel/hi3660-hikey960.dtb-$(TARGET_KERNEL_USE)