Remove sdm845-userdebug build target

Remove the common sdm845-userdebug build target.
Move the common device configs to device-common.mk and
{beryllium,enchilada}/device.mk file.

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
diff --git a/Android.mk b/Android.mk
index c735535..ff72a48 100644
--- a/Android.mk
+++ b/Android.mk
@@ -20,7 +20,7 @@
 # to only building on ARM if they include assembly. Individual makefiles
 # are responsible for having their own logic, for fine-grained control.
 
-ifneq ($(filter beryllium enchilada sdm845, $(TARGET_DEVICE)),)
+ifneq ($(filter beryllium enchilada, $(TARGET_DEVICE)),)
 
 LOCAL_PATH := $(call my-dir)