ASoC: sh: Drop SUPERH platform dependency

The SIU sound peripheral is used only on SuperH SH-Mobile platforms.
As both SUPERH and ARCH_SHMOBILE are set for these platforms, the SUPERH
dependency can be dropped.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/Kconfig

@@ -28,7 +28,7 @@ config SND_SOC_SH4_FSI
 
 config SND_SOC_SH4_SIU
 	tristate
-	depends on (SUPERH || ARCH_SHMOBILE) && HAVE_CLK
+	depends on ARCH_SHMOBILE && HAVE_CLK
 	select DMA_ENGINE
 	select DMADEVICES
 	select SH_DMAE