Reduce the max timeout for shell to 1 second.
Change the sip_svc open shell function to take millisecond as timeout
argument.
Signed-off-by: Mahesh Rao <mahesh.rao@intel.com>
Add shell based on sip_svc subsystem to access the SDM mailbox in
EL3 layer using ASYNC sip_svc request.
Signed-off-by: Mahesh Rao <mahesh.rao@intel.com>