lib: utils: Add simple FDT based HSM driver framework

The generic platform can have multiple HSM drivers so add a simple
FDT based HSM driver framework.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>

lib/utils/hsm/Kconfig

@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: BSD-2-Clause
+
+menu "HSM Device Support"
+
+config FDT_HSM
+	bool "FDT based HSM drivers"
+	depends on FDT
+	default n
+
+endmenu