hikey: Enable kernel 3.18 instead of 4.1

Test: Manual
Bug: 37983487

Change-Id: Ie12e52a708fb46e22dedeac27968e4d20388f69a
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/hikey/BoardConfig.mk b/hikey/BoardConfig.mk
index 5fb9b1e..df97048 100644
--- a/hikey/BoardConfig.mk
+++ b/hikey/BoardConfig.mk
@@ -1,14 +1,14 @@
 include device/linaro/hikey/BoardConfigCommon.mk
 
 TARGET_BOARD_PLATFORM := hikey
-ifeq ($(TARGET_KERNEL_USE), 4.1)
+ifeq ($(TARGET_KERNEL_USE), 3.18)
 BOARD_KERNEL_CMDLINE := console=ttyAMA3,115200 androidboot.console=ttyAMA3 androidboot.hardware=hikey firmware_class.path=/system/etc/firmware efi=noruntime
 else
 BOARD_KERNEL_CMDLINE := console=ttyFIQ0 androidboot.console=ttyFIQ0 androidboot.hardware=hikey firmware_class.path=/system/etc/firmware efi=noruntime
 endif
 
 ## printk.devkmsg only has meaning for kernel 4.9 and later
-## it would be ignored by kernel 4.1 and kernel 4.4
+## it would be ignored by kernel 3.18 and kernel 4.4
 BOARD_KERNEL_CMDLINE += printk.devkmsg=on
 
 TARGET_NO_DTIMAGE := true