drivers/phy: Add Marvell SerDes / PHY drivers used on Armada 3k

This version is based on the Marvell U-Boot version with this patch
applied as latest patch:

Git ID 7f408573: "fix: comphy: cp110: add comphy initialization for usb
device mode" from 2016-07-05.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Wilson Ding <dingwei@marvell.com>
Cc: Victor Gu <xigu@marvell.com>
Cc: Hua Jing <jinghua@marvell.com>
Cc: Terry Zhou <bjzhou@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
diff --git a/drivers/phy/marvell/Kconfig b/drivers/phy/marvell/Kconfig
new file mode 100644
index 0000000..4240028
--- /dev/null
+++ b/drivers/phy/marvell/Kconfig
@@ -0,0 +1,9 @@
+config MVEBU_COMPHY_SUPPORT
+	bool "ComPhy SerDes driver"
+	default n
+	help
+	  Choose this option to add support
+	  for Comphy driver.
+	  This driver passes over the lanes
+	  and initialize the lane depends on the
+	  type and speed.