ARM: N30: Use s3c_i2c0_set_platdata() to set I2C platform data

Fix mach-n30.c to use the s3c_i2c0_set_platdata() call to register the
platform data with the system to get rid of any reliance on having a real
device structure available in memory.

Since s3c_i2c0_set_platdata() copies the data, mark the original as
__initdata so it is thrown away.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>