Both kernel and U-Boot use a SMC call to the secure monitor to get the
chip ID. This call is translated by BL31 to a call to the SCP to
retrieve the ID. Add a new SiP call and the backing SCPI command.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Change-Id: Ib128f5645ee92866e7ebbcd550dacd33f573524b

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

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

All the SIP/SVC related code is currently the same between GXL and GXBB.
Rename function names and register names to avoid hardcoding the GXBB
prefix.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Change-Id: I7e58ab68489df8d4762663fc01fb64e6899cc8bf

The efuse driver is hardcoding the GXBB prefix. No need to do that since
the driver is shared between multiple SoCs.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Change-Id: I97691b0bbd55170d8216d301a3fc04feb8c2af2e

The code is the same between GXBB and GXL. Move it to the common source
directory.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Change-Id: I875689a6fd029971aa755fc2725217e90ed06b6c