arm: mxs: olinuxino: Enable USB only when needed

Enable the power to the USB port only when the USB port is really needed.
Do not enable the power unconditionally.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>

board/olimex/mx23_olinuxino/mx23_olinuxino.c

@@ -30,13 +30,25 @@ int board_early_init_f(void)
 	/* SSP0 clock at 96MHz */
 	mxs_set_sspclk(MXC_SSPCLK0, 96000, 0);
 
+	return 0;
+}
+
 #ifdef CONFIG_CMD_USB
-	/* Enable LAN9512 */
+int board_ehci_hcd_init(int port)
+{
+	/* Enable LAN9512 (Maxi) or GL850G (Mini) USB HUB power. */
 	gpio_direction_output(MX23_PAD_GPMI_ALE__GPIO_0_17, 1);
-#endif
+	udelay(100);
+	return 0;
+}
 
+int board_ehci_hcd_exit(int port)
+{
+	/* Enable LAN9512 (Maxi) or GL850G (Mini) USB HUB power. */
+	gpio_direction_output(MX23_PAD_GPMI_ALE__GPIO_0_17, 0);
 	return 0;
 }
+#endif
 
 int dram_init(void)
 {