mailbox: ti-msgmgr: Allow building under COMPILE_TEST

The TI message manager driver can be compiled without ARCH_KEYSTONE
nor ARCH_K3 enabled. Allow it to be built under COMPILE_TEST.

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/Kconfig

@@ -127,7 +127,7 @@ config STI_MBOX
 
 config TI_MESSAGE_MANAGER
 	tristate "Texas Instruments Message Manager Driver"
-	depends on ARCH_KEYSTONE || ARCH_K3
+	depends on ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST
 	default ARCH_K3
 	help
 	  An implementation of Message Manager slave driver for Keystone