Add sector information

Author: d-kato

targets/targets.json

@@ -5899,7 +5899,10 @@
         "device_has_add": ["USBDEVICE", "EMAC", "FLASH", "LPTICKER"],
         "release_versions": ["2", "5"],
         "device_name": "R7S72100",
-        "bootloader_supported": false
+        "bootloader_supported": true,
+        "mbed_rom_start"        : "0x18000000",
+        "mbed_rom_size"         : "0x800000",
+        "sectors": [[402653184,4096]]
     },
     "VK_RZ_A1H": {
         "inherits": ["RZ_A1XX"],
@@ -5916,7 +5919,10 @@
         "device_has_remove": ["ETHERNET"],
         "release_versions": ["2", "5"],
         "device_name": "R7S72103",
-        "bootloader_supported": false,
+        "bootloader_supported": true,
+        "mbed_rom_start"        : "0x18000000",
+        "mbed_rom_size"         : "0x800000",
+        "sectors": [[402653184,4096]],
         "overrides": {
             "network-default-interface-type": null
         }