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.mk b/hikey.mk
index 40e1f8b..3174ba4 100644
--- a/hikey.mk
+++ b/hikey.mk
@@ -3,7 +3,7 @@
 endif
 TARGET_PREBUILT_KERNEL := device/linaro/hikey-kernel/Image-dtb-$(TARGET_KERNEL_USE)
 TARGET_PREBUILT_DTB := device/linaro/hikey-kernel/hi6220-hikey.dtb-$(TARGET_KERNEL_USE)
-ifeq ($(TARGET_KERNEL_USE), 4.1)
+ifeq ($(TARGET_KERNEL_USE), 3.18)
 TARGET_FSTAB := fstab.hikey-$(TARGET_KERNEL_USE)
 else
 TARGET_FSTAB := fstab.hikey
diff --git a/hikey/BoardConfig.mk b/hikey/BoardConfig.mk
index f452990..9996f48 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
 
 BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1610612736
diff --git a/hikey/fstab.hikey-4.1 b/hikey/fstab.hikey-3.18
similarity index 100%
rename from hikey/fstab.hikey-4.1
rename to hikey/fstab.hikey-3.18