feat(plat/arm): add FWU support in Arm platforms

Added firmware update support in Arm platforms by using
FWU platform hooks and compiling FWU driver in BL2
component.

Change-Id: I71af06c09d95c2c58e3fd766c4a61c5652637151
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
diff --git a/plat/arm/common/fconf/arm_fconf_io.c b/plat/arm/common/fconf/arm_fconf_io.c
index 8e4469f..86fd6d5 100644
--- a/plat/arm/common/fconf/arm_fconf_io.c
+++ b/plat/arm/common/fconf/arm_fconf_io.c
@@ -18,6 +18,11 @@
 #include <plat/arm/common/arm_fconf_io_storage.h>
 #include <platform_def.h>
 
+#if PSA_FWU_SUPPORT
+/* metadata entry details */
+static io_block_spec_t fwu_metadata_spec;
+#endif /* PSA_FWU_SUPPORT */
+
 io_block_spec_t fip_block_spec = {
 /*
  * This is fixed FIP address used by BL1, BL2 loads partition table
@@ -92,6 +97,20 @@
 		open_memmap
 	},
 #endif /* ARM_GPT_SUPPORT */
+#if PSA_FWU_SUPPORT
+	[FWU_METADATA_IMAGE_ID] = {
+		&memmap_dev_handle,
+		/* filled runtime from partition information */
+		(uintptr_t)&fwu_metadata_spec,
+		open_memmap
+	},
+	[BKUP_FWU_METADATA_IMAGE_ID] = {
+		&memmap_dev_handle,
+		/* filled runtime from partition information */
+		(uintptr_t)&fwu_metadata_spec,
+		open_memmap
+	},
+#endif /* PSA_FWU_SUPPORT */
 	[FIP_IMAGE_ID] = {
 		&memmap_dev_handle,
 		(uintptr_t)&fip_block_spec,