arm64: mvebu: armada-cp110-master.dtsi: Rename comphy DT node names

Since the cp110 slave also has comphy DT nodes, the names need to be
renamed to avoid a name clash. Lets use the common naming scheme:
"cpm_xxx" for master and "cps_xxx" for slave.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Neta Zur Hershkovits <neta@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Omri Itach <omrii@marvell.com>
Cc: Igal Liberman <igall@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>