rdv1/run_model: add support for loading mcp ramfw bin

Add model parameter to enable loading of mcp_ramfw.bin file at the
address 0x0BF80000.

Signed-off-by: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>
Change-Id: I03ec25c385a05f93b31360376168e3fa15976d7e