fconf: Move platform io policies into fconf

Use the firmware configuration framework to store the io_policies
information inside the configuration device tree instead of the static
structure in the code base.

The io_policies required by BL1 can't be inside the dtb, as this one is
loaded by BL1, and only available at BL2.

This change currently only applies to FVP platform.

Change-Id: Ic9c1ac3931a4a136aa36f7f58f66d3764c1bfca1
Signed-off-by: Louis Mayencourt <louis.mayencourt@arm.com>
diff --git a/include/plat/arm/common/arm_fconf_io_storage.h b/include/plat/arm/common/arm_fconf_io_storage.h
new file mode 100644
index 0000000..02ee66c
--- /dev/null
+++ b/include/plat/arm/common/arm_fconf_io_storage.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2020, ARM Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#ifndef ARM_FCONF_IO_STORAGE_H
+#define ARM_FCONF_IO_STORAGE_H
+
+#include <stdint.h>
+
+/* IO devices handle */
+extern uintptr_t memmap_dev_handle;
+extern uintptr_t fip_dev_handle;
+
+/* Function declarations */
+int open_fip(const uintptr_t spec);
+int open_memmap(const uintptr_t spec);
+
+#endif /* ARM_FCONF_IO_STORAGE_H */