ARM: dts: AM33xx: Add mailbox node

The mailbox DT node data has been added for AM33xx device.
The mailbox IP in AM33xx is similar to the version found in
OMAP4+ devices.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
1 file changed