Add a new aml_* prefix to the SCPI related function calls.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Change-Id: I697812ac1c0df28cbb639a1dc3e838f1107fb739

No need to have a special SoC-specific prefix.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Change-Id: I0da543e7d92d56604e79440a98027ffd9a2eaa59

As for most of the Amlogic code, this is common between the Amlogic
SoCs. Move the code to the common directory.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Change-Id: Id3f0073ff1f0b9ddbe964f80303323ee4a2f27b0