gdbstub: rationalise signal mapping in softmmu

We don't really need a table for mapping two symbols.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230302190846.2593720-13-alex.bennee@linaro.org>
Message-Id: <20230303025805.625589-13-richard.henderson@linaro.org>

gdbstub/softmmu.c

@@ -506,20 +506,14 @@ enum {
     TARGET_SIGTRAP = 5
 };
 
-static int gdb_signal_table[] = {
-    -1,
-    -1,
-    TARGET_SIGINT,
-    -1,
-    -1,
-    TARGET_SIGTRAP
-};
-
 int gdb_signal_to_target(int sig)
 {
-    if (sig < ARRAY_SIZE(gdb_signal_table)) {
-        return gdb_signal_table[sig];
-    } else {
+    switch (sig) {
+    case 2:
+        return TARGET_SIGINT;
+    case 5:
+        return TARGET_SIGTRAP;
+    default:
         return -1;
     }
 }