core: riscv: Add a reserved-memory node for static shared memory

To prevent Linux from using static shared memory, include the
dedicated reserved-memory node in the device tree.

Signed-off-by: Alvin Chang <alvinga@andestech.com>
Reviewed-by: Yu Chien Peter Lin <peterlin@andestech.com>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>

core/arch/riscv/kernel/boot.c

@@ -47,6 +47,11 @@ static void update_external_dt(void)
 	if (!dt || !dt->blob)
 		return;
 
+#ifdef CFG_CORE_RESERVED_SHM
+	if (mark_static_shm_as_reserved(dt))
+		panic("Failed to config non-secure memory");
+#endif
+
 	if (mark_tddram_as_reserved(dt))
 		panic("Failed to config secure memory");
 }