Factor out the sdm845 device configuration

Moved files around in a new shared/ folder. Renamed relevant
files and updated relative path. No feature changes.

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
[caleb: rebased on 734404a]
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/beryllium/BoardConfig.mk b/beryllium/BoardConfig.mk
index 3a684a0..3e1d727 100644
--- a/beryllium/BoardConfig.mk
+++ b/beryllium/BoardConfig.mk
@@ -1,4 +1,4 @@
-include device/generic/sdm845/BoardConfigCommon.mk
+include device/generic/sdm845/shared/BoardConfig.mk
 
 # Copied from https://github.com/LineageOS/android_device_xiaomi_sdm845-common/blob/lineage-16.0/BoardConfigCommon.mk
 # Board Information