ALSA: usb-audio: Fix build with CONFIG_INPUT=n

The recent addition of DualSense mixer quirk relies on the input
device handle, and the build can fail if CONFIG_INPUT isn't set.
Put (rather ugly) workarounds to wrap with IS_REACHABLE() for avoiding
the build error.

Fixes: 79d561c ("ALSA: usb-audio: Add mixer quirk for Sony DualSense PS5")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202506130733.gnPKw2l3-lkp@intel.com/
Reviewed-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://patch.msgid.link/20250613081543.7404-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Author: tiwai

sound/usb/mixer_quirks.c

@@ -532,6 +532,7 @@ static int snd_emu0204_controls_create(struct usb_mixer_interface *mixer)
 					  &snd_emu0204_control, NULL);
 }
 
+#if IS_REACHABLE(CONFIG_INPUT)
 /*
  * Sony DualSense controller (PS5) jack detection
  *
@@ -788,6 +789,7 @@ static int snd_dualsense_controls_create(struct usb_mixer_interface *mixer)
 
 	return snd_dualsense_jack_create(mixer, "Headset Mic Jack", false);
 }
+#endif /* IS_REACHABLE(CONFIG_INPUT) */
 
 /* ASUS Xonar U1 / U3 controls */
 
@@ -4331,10 +4333,12 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
 		err = snd_emu0204_controls_create(mixer);
 		break;
 
+#if IS_REACHABLE(CONFIG_INPUT)
 	case USB_ID(0x054c, 0x0ce6): /* Sony DualSense controller (PS5) */
 	case USB_ID(0x054c, 0x0df2): /* Sony DualSense Edge controller (PS5) */
 		err = snd_dualsense_controls_create(mixer);
 		break;
+#endif /* IS_REACHABLE(CONFIG_INPUT) */
 
 	case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
 	case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C400 */