linux-phytec-ti

dt-bindings: mailbox: omap: Update bindings for TI K3 AM65x SoCs

The TI K3 AM65x family of SoCs have a new Mailbox IP that is based
on the existing Mailbox IP present in OMAP architecture based SoCs.
Update the existing OMAP Mailbox bindings for this new IP present
on TI K3 AM65x SoCs.

Signed-off-by: Suman Anna <s-anna@ti.com>