mpc85xx: Fix SERDES/eTSEC message indentation

Previously some mpc85xx boards printed indented messages such as the
following on bootup:
  printf("    eTSEC4 is in sgmii mode.\n");
  printf("    Serdes2 disalbed\n");

The bootup appearance looks cleaner if the indentation is removed which
aligns these messages with other bootup output.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
CC: galak@kernel.crashing.org