arm: mvebu: clearfog: reset uSOM onboard 1512 phy

Use GPIO19 which is wired to the uSOM phy reset signal in order to reset
the uSOM's 1512 Gigabit Ethernet phy.

This GPIO is valid on ClearFog rev 2.1 and newer.

Taken from SolidRun's specialised u-boot, see
f906e3df17

Signed-off-by: Patrick Wildt <patrick@blueri.se>
Signed-off-by: Stefan Roese <sr@denx.de>

board/solidrun/clearfog/clearfog.c

@@ -131,8 +131,12 @@ int board_init(void)
 	/* Toggle GPIO41 to reset onboard switch and phy */
 	clrbits_le32(MVEBU_GPIO1_BASE + 0x0, BIT(9));
 	clrbits_le32(MVEBU_GPIO1_BASE + 0x4, BIT(9));
+	/* GPIO 19 on ClearFog rev 2.1 controls the uSOM onboard phy reset */
+	clrbits_le32(MVEBU_GPIO0_BASE + 0x0, BIT(19));
+	clrbits_le32(MVEBU_GPIO0_BASE + 0x4, BIT(19));
 	mdelay(1);
 	setbits_le32(MVEBU_GPIO1_BASE + 0x0, BIT(9));
+	setbits_le32(MVEBU_GPIO0_BASE + 0x0, BIT(19));
 	mdelay(10);
 
 	/* Init I2C IO expanders */