Drop USB audio support

USB audio support isn't fully implemented or set up at the moment. It is
causing CTS verifier tests to fail. Drop this feature entirely until
it's fixed, eventually.

Issue: FP2P-478
Test: CtsVerifier manualTests#com.android.cts.verifier.audio.USBAudioPeripheralAttributesActivity and related
Change-Id: I7f49ad87943672a3eae9547e35a1eee1004db614
diff --git a/arch/arm/configs/fairphone-perf_defconfig b/arch/arm/configs/fairphone-perf_defconfig
index 694057b..cbfb268 100755
--- a/arch/arm/configs/fairphone-perf_defconfig
+++ b/arch/arm/configs/fairphone-perf_defconfig
@@ -432,7 +432,7 @@
 # CONFIG_BACKLIGHT_GENERIC is not set
 CONFIG_SOUND=y
 CONFIG_SND=y
-CONFIG_SND_USB_AUDIO=y
+CONFIG_SND_USB_AUDIO=n
 CONFIG_SND_SOC=y
 CONFIG_SND_SOC_MSM8974=y
 CONFIG_SND_SOC_APQ8074=y
diff --git a/arch/arm/configs/fairphone_defconfig b/arch/arm/configs/fairphone_defconfig
index 1d4cb5a..884c617 100755
--- a/arch/arm/configs/fairphone_defconfig
+++ b/arch/arm/configs/fairphone_defconfig
@@ -436,7 +436,7 @@
 # CONFIG_BACKLIGHT_GENERIC is not set
 CONFIG_SOUND=y
 CONFIG_SND=y
-CONFIG_SND_USB_AUDIO=y
+CONFIG_SND_USB_AUDIO=n
 CONFIG_SND_SOC=y
 CONFIG_SND_SOC_MSM8974=y
 CONFIG_SND_SOC_APQ8074=y