ARM: 5833/1: ARM nomadik: enable U8500 for common platform

Enable U8500 architecture to get access to
the common code shared across various
ST-Ericsson's machines like nomadik.

Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com>
Acked-by: Andrea Gallo <andrea.gallo@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>