D-Bus: Fix dont_quote const declaration

Commit 38279bdb35c1b0c248289752197ebddd2fdd52ef ('D-Bus: Coding style
cleanup') handled the dbus_new_handlers.c change properly, but misplaced
the second 'const' in dbus_old_handlers.c in a way that resulted in
duplicated const rather than marking the actual value const.

Signed-off-by: Jouni Malinen <j@w1.fi>

wpa_supplicant/dbus/dbus_old_handlers.c

@@ -809,7 +809,7 @@ out:
 }
 
 
-static const char  const *dont_quote[] = {
+static const char * const dont_quote[] = {
 	"key_mgmt", "proto", "pairwise", "auth_alg", "group", "eap",
 	"opensc_engine_path", "pkcs11_engine_path", "pkcs11_module_path",
 	"bssid", NULL