MmRpc: MmServiceMgr: Use Any Address for Port

MmRpc: MmServiceMgr: Use Any Address for Port

It is not required that the local endpoint be a certain value
when creating an OmapRpc instance. Since we are performing a
NameMap of the created endpoint to the host, the endpoint can
be any value. In fact, hard-coding the value prevents multiple
MmServiceMgr instances from being created on a processor.

This patch changes the port value from the hard-coded value
of 59 to be a value that is assigned by the RPMessage_create
call. In this way, multiple MmServiceMgr instances can
be created.

Signed-off-by: Angela Stegmaier <angelabaker@ti.com>