[ARM] 4745/1: pcm027: default configuration

This patch adds a basic configration for the phyCORE-PXA270 development kit. In this case development kit means PCM-990 (main baseboard).
Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>