modules: Add trusted-firmware-a Kconfig source

- Fix undefined BUILD_WITH_TFA symbol warning
- Properly source TF-A module Kconfig in main modules configuration
- Ensures TF-A related symbols are available for board configurations

Signed-off-by: Appana Durga Kedareswara rao <[email protected]>

Author: Appana Durga Kedareswara rao

modules/Kconfig

@@ -47,6 +47,7 @@ source "modules/Kconfig.xtensa"
 source "modules/zcbor/Kconfig"
 source "modules/Kconfig.mcuboot"
 source "modules/Kconfig.intel"
+source "modules/trusted-firmware-a/Kconfig"
 source "modules/hostap/Kconfig"
 
 comment "Unavailable modules, please install those via the project manifest."