[ARM] 3440/1: [S3C2410] make SMDK2410 and SMDK2440 similarities common

Patch from Ben Dooks

The SMDK2410 and SMDK2440 boards have a number of items
in common, including the LEDs, Ethernet, PCMCIA. Make
a common SMDK support file.

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