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: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/arch/arm/cpu/armv7/sunxi/board.c b/arch/arm/cpu/armv7/sunxi/board.c
index 8f2cef3..f2cedbb 100644
--- a/arch/arm/cpu/armv7/sunxi/board.c
+++ b/arch/arm/cpu/armv7/sunxi/board.c
@@ -129,6 +129,11 @@
 {
 	__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) {