ARM: tegra: only select MACH_HAS_SND_SOC_TEGRA_WM8903 if SND_SOC

This fixes:
	warning: (MACH_HARMONY && MACH_KAEN && MACH_SEABOARD) selects MACH_HAS_SND_SOC_TEGRA_WM8903 which has unmet direct dependencies (SOUND && !M68K && SND && SND_SOC)

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Stephen Warren <swarren@nvidia.com>
Acked-By: Colin Cross <ccross@android.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-tegra/Kconfig

@@ -27,14 +27,14 @@ comment "Tegra board type"
 
 config MACH_HARMONY
        bool "Harmony board"
-       select MACH_HAS_SND_SOC_TEGRA_WM8903
+       select MACH_HAS_SND_SOC_TEGRA_WM8903 if SND_SOC
        help
          Support for nVidia Harmony development platform
 
 config MACH_KAEN
        bool "Kaen board"
        select MACH_SEABOARD
-       select MACH_HAS_SND_SOC_TEGRA_WM8903
+       select MACH_HAS_SND_SOC_TEGRA_WM8903 if SND_SOC
        help
          Support for the Kaen version of Seaboard
 
@@ -45,7 +45,7 @@ config MACH_PAZ00
 
 config MACH_SEABOARD
        bool "Seaboard board"
-       select MACH_HAS_SND_SOC_TEGRA_WM8903
+       select MACH_HAS_SND_SOC_TEGRA_WM8903 if SND_SOC
        help
          Support for nVidia Seaboard development platform. It will
 	 also be included for some of the derivative boards that