phy: marvell: cp110: let the firmware configure comphy for PCIe

Replace the comphy initialization for PCIe with appropriate SMC call, so
the firmware will perform appropriate comphy initialization.

Signed-off-by: Grzegorz Jaszczyk <jaz@semihalf.com>
Signed-off-by: Ken Ma <make@marvell.com>
Reviewed-by: Igal Liberman <igall@marvell.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>