cimx/sb800/cfg.c: Cut out purposeless ROM reading noise.

Follow along hudson, cut out "SLP_TYP type was 0" excessively filling
the buffer. We could make this conditional on non-zero?

Change-Id: Iffd4c146b2ac4f57dbc3a011a683c92b6e132e39
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5495
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>