ALSA: usb-audio: qcom: fix USB_XHCI dependency

SND_USB_AUDIO_QMI depends on USB_XHCI_SIDEBAND, but that is a bool symbol
and allows it to be built-in even when XHCI itself is in a loadable module.
That configuration causes a link failure:

arm-linux-gnueabi-ld: sound/usb/qcom/qc_audio_offload.o: in function `uaudio_event_ring_cleanup_free':
qc_audio_offload.c:(.text+0x7dc): undefined reference to `xhci_sideband_remove_interrupter'
arm-linux-gnueabi-ld: sound/usb/qcom/qc_audio_offload.o: in function `uaudio_endpoint_setup':
qc_audio_offload.c:(.text+0xe88): undefined reference to `xhci_sideband_add_endpoint'

Add the extra dependency on USB_XHCI itself.

Fixes: 326bbc3 ("ALSA: usb-audio: qcom: Introduce QC USB SND offloading support")
Signed-off-by: Arnd Bergmann <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: arndb

sound/usb/Kconfig

@@ -178,7 +178,8 @@ config SND_BCD2000
 
 config SND_USB_AUDIO_QMI
 	tristate "Qualcomm Audio Offload driver"
-	depends on QCOM_QMI_HELPERS && SND_USB_AUDIO && USB_XHCI_SIDEBAND && SND_SOC_USB
+	depends on QCOM_QMI_HELPERS && SND_USB_AUDIO && SND_SOC_USB
+	depends on USB_XHCI_HCD && USB_XHCI_SIDEBAND
 	help
 	  Say Y here to enable the Qualcomm USB audio offloading feature.