ARM: s3c24xx: move regs-spi.h into spi driver

The file is mostly specific to the driver, the few bits that
are actually used by the platform code get moved to mach/map.h
instead.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20200806182059.2431-20-krzk@kernel.org


Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>