remoteproc: add an api to do pa to da conversion

Added an api to provide memory translation from a
physical address to a device virtual address.
Since, carveouts and mappings are stored separately,
we need to traverse both lists.

Also stored the physical addresses for RSC_DEVMEM entries
to enable pa to da conversion for dev mem address spaces too.

Signed-off-by: Subramaniam C.A <subramaniam.ca@ti.com>
Signed-off-by: Fernando Guzman Lugo <fernando.lugo@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>