ARM: s3c6400_defconfig: Save defconfig

Generate new defconfig to get rid of obsolete Kconfig entries:
 - S3C_BOOT_ERROR_RESET, SND_S3C24XX_SOC and SND_SOC_SMDK_WM9713 are
   gone;
 - rest of entries is being removed by default values;

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>