ARM: dts: NSP: Add mailbox (PDC) to NSP

Adds mailbox / PDC to NSP device tree.  Needs new compatibility string
to differentiate from NS2 version.

Signed-off-by: Steve Lin <steven.lin1@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
1 file changed