[PATCH] ASoC: Intel: Make sure we only build SST drivers on X86

[Liam Girdwood <liam.r.girdwood@linux.intel.com>]

Disable build on non X86 architectures. This fixes the following build
errors on PPC :-

sound/soc/intel/sst-dsp.c: In function 'sst_dsp_outbox_write':
sound/soc/intel/sst-dsp.c:218:2: error: implicit declaration of function 'memcpy_toio' [-Werror=implicit-function-declaration]
  memcpy_toio(sst->mailbox.out_base, message, bytes);
  ^
sound/soc/intel/sst-dsp.c: In function 'sst_dsp_outbox_read':
sound/soc/intel/sst-dsp.c:231:2: error: implicit declaration of function 'memcpy_fromio' [-Werror=implicit-function-declaration]
  memcpy_fromio(message, sst->mailbox.out_base, bytes);
  ^

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
---
 sound/soc/intel/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/intel/Kconfig b/sound/soc/intel/Kconfig
index c962432..e61bd89 100644
--- a/sound/soc/intel/Kconfig
+++ b/sound/soc/intel/Kconfig
@@ -15,6 +15,7 @@ config SND_SST_MFLD_PLATFORM
 config SND_SOC_INTEL_SST
 	tristate "ASoC support for Intel(R) Smart Sound Technology"
 	select SND_SOC_INTEL_SST_ACPI if ACPI
+	depends on X86
 	help
           This adds support for Intel(R) Smart Sound Technology (SST).
           Say Y if you have such a device
-- 
1.8.3.2