mailbox: k3-sec-proxy: Add DM to DMSC communication thread for J722S

J722S R5 SPL uses sec-proxy threads 28 and 29 for communication with
TIFS. Mark these as valid threads in the driver.

https://software-dl.ti.com/tisci/esd/latest/5_soc_doc/j722s/sec_proxy.html

Signed-off-by: Vaishnav Achath <vaishnav.a@ti.com>
Signed-off-by: Prasanth Babu Mantena <p-mantena@ti.com>
Reviewed-by: Udit Kumar <u-kumar1@ti.com>
1 file changed