[ALSA] soc/sh: let SND_SOC_PCM_SH7760 depend on SH_DMABRG

Let SND_SOC_PCM_SH7760 depend on SH_DMABRG rather than select'ing it.
Gets rid of the Kbuild warning about SH_DMABRG being undefined on non-sh
builds.
Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/soc/sh/Kconfig

@@ -2,8 +2,7 @@ menu "SoC Audio support for SuperH"
 
 config SND_SOC_PCM_SH7760
 	tristate "SoC Audio support for Renesas SH7760"
-	depends on CPU_SUBTYPE_SH7760 && SND_SOC
-	select SH_DMABRG
+	depends on CPU_SUBTYPE_SH7760 && SND_SOC && SH_DMABRG
 	help
 	  Enable this option for SH7760 AC97/I2S audio support.