sm6225-common: Initial common configuration

Change-Id: I0adf216d82eca438a4d2c76349439c46830c08e9
diff --git a/proprietary-files.txt b/proprietary-files.txt
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index 0000000..2d9cfb1
--- /dev/null
+++ b/proprietary-files.txt
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+# TODO: Bringup proprietary files listing