GR_LYCHEE: enable bootloader support

Author: d-kato

targets/targets.json

@@ -5867,7 +5867,10 @@
         "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": [[0,4096]],
         "overrides": {
             "network-default-interface-type": null
         }

tools/arm_pack_manager/index.json

@@ -303008,20 +303008,20 @@
             "version": "1.2.1"
         }, 
         "memories": {
-            "PROGRAM_FLASH": {
+            "IRAM1": {
                 "access": {
                     "execute": true, 
                     "non_secure": false, 
                     "non_secure_callable": false, 
                     "peripheral": false, 
                     "read": true, 
                     "secure": false, 
-                    "write": false
+                    "write": true
                 }, 
                 "default": true, 
-                "size": 8388608, 
-                "start": 402653184, 
-                "startup": true
+                "size": 3145728, 
+                "start": 536870912, 
+                "startup": false
             }
         },
         "name": "R7S72103", 
@@ -303033,12 +303033,7 @@
                 "units": 1
             }
         }, 
-        "sectors": [
-            [
-                0, 
-                4096
-            ]
-        ], 
+        "sectors": [], 
         "sub_family": "RZ_A1LU",
         "vendor": "Renesas:117"
     },