First move of items out of include/asm-arm/plat-s3c* to their
new homes under arch/arm/plat-s3c/include/plat and
arch/arm/plat-s3c24xx/include/plat directories.

Note, we have to create a dummy arch/arm/plat-s3c/Makefile to
allow us to add arch/arm/plat-s3c/include/plat to the path.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Move debugging output to dev_dbg() instead of dev_info().
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Fix the following sparse warnings in arch/arm/plat-s3c24xx/pwm.c:

warning: symbol 's3c_device_timer' was not declared. Should it be static?
warning: symbol 'pwm_calc_tin' was not declared. Should it be static?
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Add support for PWM in the S3C24XX series of SoC via the
PWM API.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>