sunxi: Add CONFIG_MACPWR option

On some boards the ethernet-phy needs to be powered up through a gpio,
add support for this.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Acked-by: NIan Campbell <ijc@hellion.org.uk>

arch/arm/cpu/armv7/sunxi/board.c

@@ -129,6 +129,11 @@ int cpu_eth_init(bd_t *bis)
 {
 	__maybe_unused int rc;
 
+#ifdef CONFIG_MACPWR
+	gpio_direction_output(CONFIG_MACPWR, 1);
+	mdelay(200);
+#endif
+
 #ifdef CONFIG_SUNXI_EMAC
 	rc = sunxi_emac_initialize(bis);
 	if (rc < 0) {