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>

We need a way to pass controller specific information to the SPI driver.
For that purpose new headers are made.

SPI Controller is assumed 'type-s3c64xx' and can be defined for newer SoCs.
 Hence, that part is placed under plat-samsung to be shared across newer SoCs.

SoC specific part - spi source clocks, will be placed
under plat-<soc>/include/plat/
Signed-off-by: NJassi Brar <jassi.brar@samsung.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>