net: iosm: shared memory IPC interface

1) Initializes shared memory for host-device communication.
2) Allocate resources required for control & data operations.
3) Transfers the Device IRQ to IPC execution thread.
4) Defines the timer cbs for async events.

Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>