Revert "axolotl: sync defconfig setup with kernel repo"

This reverts commit e75923ce4fd669a9f8eaed0d5876466da98f63ba.

Change-Id: Ie7f62ddd3b962182850458f0757c131c37dd7e33
Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>
diff --git a/BoardConfig.mk b/BoardConfig.mk
index c1ec479..61155ca 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -47,11 +47,14 @@
 TARGET_ENABLE_MEDIADRM_64 := true
 
 # Kernel
-ifeq ($(TARGET_BUILD_VARIANT),userdebug)
-    TARGET_KERNEL_CONFIG += vendor/shift/debug.config
-
-    # Enable console for userdebug
-    BOARD_KERNEL_CMDLINE += console=ttyMSM0,115200n8 earlycon=msm_geni_serial,0xA84000
+ifeq ($(TARGET_BUILD_VARIANT),eng)
+    TARGET_KERNEL_CONFIG := axolotl_eng_defconfig
+else
+    ifeq ($(TARGET_BUILD_VARIANT),userdebug)
+        TARGET_KERNEL_CONFIG := axolotl_userdebug_defconfig
+    else
+        TARGET_KERNEL_CONFIG := axolotl_user_defconfig
+    endif
 endif
 
 # Security patch level