trusted_storage: Forbid usage with NRF_IRONSIDE

The NRF_IRONSIDE is a provider of PSA services (including storage)
so it cannot be used along with the truested storage subsystem which
provides PSA storage APIs.

Signed-off-by: Georgios Vasilakis <[email protected]>

Author: Vge0rge

subsys/trusted_storage/Kconfig

@@ -9,6 +9,7 @@
 menuconfig TRUSTED_STORAGE
 	bool "Trusted Storage"
 	depends on !BUILD_WITH_TFM
+	depends on !NRF_IRONSIDE
 	help
 	  The secure storage subsystem allows its users to store data in a
 	  secure way, ensuring data integrity and confidentiality by using AEAD