[ARM] pxa/palm: fix possibly uninitialized variable in PalmTC-pcmcia

This 'problem' actually cant cause a failure of the driver, but it's always
better to be correct.
Signed-off-by: NMarek Vasut <marek.vasut@gmail.com>
Signed-off-by: NEric Miao <eric.y.miao@gmail.com>

drivers/pcmcia/pxa2xx_palmtc.c

@@ -156,7 +156,7 @@ static int palmtc_wifi_powerup(void)
 static int palmtc_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 					const socket_state_t *state)
 {
-	int ret;
+	int ret = 1;
 
 	if (state->Vcc == 0)
 		ret = palmtc_wifi_powerdown();