Fix compiler error with JIT when Zba is disabled

When using 'make ENABLE_Zba=0 ENABLE_JIT=1', the following errors are
observed:

src/jit.c:1760:17: error: ‘do_sh3add’ defined but not used [-Werror=unused-function]
src/jit.c:1760:17: error: ‘do_sh2add’ defined but not used [-Werror=unused-function]
src/jit.c:1760:17: error: ‘do_sh1add’ defined but not used [-Werror=unused-function]

Include 'Zba' in EXT_LIST to ensure instructions like 'sh3add',
'sh2add', and 'sh1add' are properly handled, resolving unused function
errors during JIT builds.

Author: eleanorLYJ

tools/gen-jit-template.py

@@ -102,8 +102,13 @@
         "cfsw",
     ],
     "SYSTEM": ["sret"],
+    "Zba": [
+        "sh3add",
+        "sh2add",
+        "sh1add",
+    ],
 }
-EXT_LIST = ["Zifencei", "Zicsr", "EXT_M", "EXT_A", "EXT_F", "EXT_C", "SYSTEM"]
+EXT_LIST = ["Zifencei", "Zicsr", "EXT_M", "EXT_A", "EXT_F", "EXT_C", "SYSTEM", "Zba"]
 SKIP_LIST = []
 # check enabled extension in Makefile