tqma6_wru4: Fix the reset delay for the the LAN8720 PHY

According to the LAN8720 datasheet tpurstd (time that reset line should
stay asserted) is 25ms.

So do as suggested by the LAN8720 datasheet.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>

board/tqc/tqma6/tqma6_wru4.c

@@ -177,7 +177,7 @@ static void setup_iomuxc_enet(void)
 	ret = gpio_request(ENET_PHY_RESET_GPIO, "phy-reset");
 	if (!ret)
 		gpio_direction_output(ENET_PHY_RESET_GPIO , 0);
-	udelay(1000);
+	udelay(25000);
 	gpio_set_value(ENET_PHY_RESET_GPIO, 1);
 }