arm: socfpga: nic301: Add NIC-301 configuration code

arm: socfpga: nic301: Add NIC-301 configuration code

Add code which configures the AMBA NIC-301 and the SCU on the SoCFPGA .
The code sets the access permissions for the CPU to the AMBA slaves such
that the CPU can access them in both secure and non-secure mode.

Signed-off-by: Marek Vasut <[email protected]>
Cc: Chin Liang See <[email protected]>
Cc: Dinh Nguyen <[email protected]>
Cc: Albert Aribaud <[email protected]>
Cc: Tom Rini <[email protected]>
Cc: Wolfgang Denk <[email protected]>
Cc: Pavel Machek <[email protected]>