uboot-imx

fix: phy: marvell: cp110: rename comphy_index to cp_index

No functional change.
The variable name "comphy_index" is misleading, it represents
cp index and not comphy index.

Signed-off-by: Igal Liberman <igall@marvell.com>
Reviewed-by: Stefan Roese <sr@denx.de>