mailbox: ti-msgmgr: Remove use of of_match_ptr() helper

When OF support is disabled the of_device_id struct match table can be
conditionally compiled out, this helper allows the assignment to also be
turned into a NULL conditionally. When the of_device_id struct is not
conditionally defined based on OF then the table will be unused causing a
warning. The two options are to either set the table as _maybe_unused, or
to just remove this helper since the table will always be defined.
Do the latter here.

Signed-off-by: Andrew Davis <afd@ti.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>

Author: glneo

drivers/mailbox/ti-msgmgr.c

@@ -920,7 +920,7 @@ static struct platform_driver ti_msgmgr_driver = {
 	.probe = ti_msgmgr_probe,
 	.driver = {
 		   .name = "ti-msgmgr",
-		   .of_match_table = of_match_ptr(ti_msgmgr_of_match),
+		   .of_match_table = ti_msgmgr_of_match,
 		   .pm = &ti_msgmgr_pm_ops,
 	},
 };