amlogic: Move SCPI code to common directory

The SCPI code is the same between GXBB and GXL. No need to have it
replicated for each SoCs. Move it to the common directory.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Change-Id: I7e416caf1e9538b3ce7702c0363ee00a054e2451
5 files changed