colibri-imx6ull: fix ethernet phy power on

Just give the new Ethernet PHY power save mode circuitry time to settle.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Acked-by: Max Krummenacher <max.krummenacher@toradex.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
diff --git a/board/toradex/colibri-imx6ull/colibri-imx6ull.c b/board/toradex/colibri-imx6ull/colibri-imx6ull.c
index fe60b8e..b6f45ed 100644
--- a/board/toradex/colibri-imx6ull/colibri-imx6ull.c
+++ b/board/toradex/colibri-imx6ull/colibri-imx6ull.c
@@ -263,6 +263,9 @@
 			IOMUX_GPR1_FEC2_CLOCK_MUX2_SEL_MASK,
 			IOMUX_GPR1_FEC2_CLOCK_MUX1_SEL_MASK);
 
+	/* give new Ethernet PHY power save mode circuitry time to settle */
+	mdelay(300);
+
 	return 0;
 }