Fix wrong delete in xiegu.c

https://github.com/Hamlib/Hamlib/issues/1351

rigs/icom/xiegu.c

@@ -174,7 +174,7 @@ const struct rig_caps x108g_caps =
     .has_get_parm =  X108G_PARMS,
     .has_set_parm =  RIG_PARM_SET(X108G_PARMS),
     .level_gran = {
-        // cppcheck-suppress *
+        [LVL_RAWSTR] = { .min = { .i = 0 }, .max = { .i = 255 } },
     },
     .parm_gran =  {},
     .ctcss_list =  common_ctcss_list,