zynqmp: pm: Implement IOCTL APIs for remoteproc

Implement ioctl APIs which uses MMIO operations
to control RPU operations. Below IOCTLs are supported
in this patch:
  * Get RPU operation mode
  * Set RPU operation mode
  * Configure RPU boot address (OCM/TCM)
  * Configure TCM combined mode

Signed-off-by: Rajan Vaja <rajanv@xilinx.com>
Signed-off-by: Jolly Shah <jollys@xilinx.com>
8 files changed