ALSA: usb: Use *-y instead of *-objs in Makefile

*-objs suffix is reserved rather for (user-space) host programs while
usually *-y suffix is used for kernel drivers (although *-objs works
for that purpose for now).

Let's correct the old usages of *-objs in Makefiles.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20240507135513.14919-6-tiwai@suse.de

sound/usb/6fire/Makefile

 # SPDX-License-Identifier: GPL-2.0-only
-snd-usb-6fire-objs += chip.o comm.o midi.o control.o firmware.o pcm.o
+snd-usb-6fire-y += chip.o comm.o midi.o control.o firmware.o pcm.o
 obj-$(CONFIG_SND_USB_6FIRE) += snd-usb-6fire.o
 

sound/usb/Makefile

@@ -3,7 +3,7 @@
 # Makefile for ALSA
 #
 
-snd-usb-audio-objs := 	card.o \
+snd-usb-audio-y := 	card.o \
 			clock.o \
 			endpoint.o \
 			format.o \
@@ -25,7 +25,7 @@ snd-usb-audio-objs := 	card.o \
 snd-usb-audio-$(CONFIG_SND_USB_AUDIO_MIDI_V2) += midi2.o
 snd-usb-audio-$(CONFIG_SND_USB_AUDIO_USE_MEDIA_CONTROLLER) += media.o
 
-snd-usbmidi-lib-objs := midi.o
+snd-usbmidi-lib-y := midi.o
 
 # Toplevel Module Dependency
 obj-$(CONFIG_SND_USB_AUDIO) += snd-usb-audio.o snd-usbmidi-lib.o

sound/usb/hiface/Makefile

 # SPDX-License-Identifier: GPL-2.0-only
-snd-usb-hiface-objs := chip.o pcm.o
+snd-usb-hiface-y := chip.o pcm.o
 obj-$(CONFIG_SND_USB_HIFACE) += snd-usb-hiface.o

sound/usb/misc/Makefile

 # SPDX-License-Identifier: GPL-2.0-only
-snd-ua101-objs := ua101.o
+snd-ua101-y := ua101.o
 obj-$(CONFIG_SND_USB_UA101) += snd-ua101.o

sound/usb/usx2y/Makefile

 # SPDX-License-Identifier: GPL-2.0
-snd-usb-usx2y-objs := usbusx2y.o usX2Yhwdep.o usx2yhwdeppcm.o
-snd-usb-us122l-objs := us122l.o
+snd-usb-usx2y-y := usbusx2y.o usX2Yhwdep.o usx2yhwdeppcm.o
+snd-usb-us122l-y := us122l.o
 
 obj-$(CONFIG_SND_USB_USX2Y) += snd-usb-usx2y.o
 obj-$(CONFIG_SND_USB_US122L) += snd-usb-us122l.o