nuvoton m2351: fix RAM regions - only one RAM1

Revert latest change to index. Linker scripts follow one RAM region. If index is updated,
requires further changes in the target that should be done separately.

Author: 0xc0170

tools/arm_pack_manager/index.json

@@ -163827,25 +163827,10 @@
                     "write": true
                 }, 
                 "default": true, 
-                "size": 32768, 
+                "size": 98304, 
                 "start": 536870912, 
                 "startup": false
             }, 
-            "IRAM2": {
-                "access": {
-                    "execute": false, 
-                    "non_secure": false, 
-                    "non_secure_callable": false, 
-                    "peripheral": false, 
-                    "read": true, 
-                    "secure": false, 
-                    "write": true
-                }, 
-                "default": false, 
-                "size": 65536, 
-                "start": 805339136, 
-                "startup": false
-            }, 
             "IROM1": {
                 "access": {
                     "execute": true,