ASoC: Samsung: Generalize Kconfig symbols

Move prefixes to repesent the nature of Samsung ASoC suitably.
        SND_S3C24XX_SOC -> ASOC_SAMSUNG
        SND_S3C_SOC_PCM -> SND_SAMSUNG_PCM
        SND_S3C_SOC_AC97 -> SND_SAMSUNG_AC97
        SND_S5P_SOC_SPDIF -> SND_SAMSUNG_SPDIF
        SND_S3C24XX_SOC_I2S -> SND_S3C24XX_I2S
        SND_S3C64XX_SOC_SMARTQ -> ASOC_SMARTQ
        SND_SOC_SMDK_SPDIF -> ASOC_SAMSUNG_SMDK_SPDIF
        SND_SOC_SMDK_WM8580 -> ASOC_SAMSUNG_SMDK_WM8580
        SND_SOC_SMDK_WM9713 -> ASOC_SAMSUNG_SMDK_WM9713
        SND_SOC_GONI_AQUILA_WM8994 -> ASOC_GONI_AQUILA_WM8994

Signed-off-by: Jassi Brar <jassi.brar@samsung.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>