Move the S3C64XX specific device and setup files into mach-s3c64xx as
they are unlikely to be used outside of this code.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Move the register and GPIO definition files from plat-s3c64xx into the
machine include direcotry as they are unlikely to be reused outside
mach-s3c64xx.

This move includes removing the empty <mach/regs-clock.h> and replacing
it with the <plat/regs-clock.h> implementation.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Add common gpio setup for i2c bus 1 on all current
S3C64XX architectures.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Add the necessary device initialisation information
for I2C device 0.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>