[ARM] 3376/2: S3C2410 - update defconfig

Patch from Ben Dooks

Add Simtec Osiris to the default build, and enable the
USB-OHCI section by default.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>