Lowercasify: L01F and LGL22 to l01f and lgl22

Change-Id: Ib8240a6e9e691c7c6512c4dbbd6b964c82771d2d
Clean up
G2_DTS_TARGET can be override in the device-specific tree.

Change-Id: Ic3108a8f217145c425ddbb4f0747ce90fe4de3ae