Remove instances of phy_read/write

There were a few files which were already using phy_read and phy_write
for their PHY function names.  It's only a few places, and the name
seems most appropriate for the high-level abstraction, so let's
rename the other versions to something more specific.

Also, uec_phy.c had a marvell_init function which I renamed to not
conflict with the one in marvell.c

Lastly, uec_phy.c was putting a space between the phy writing
function names, and the open paren, so I fixed that

Signed-off-by: Andy Fleming <afleming@freescale.com>
Acked-by: Detlev Zundel <dzu@denx.de>