ASoC: cirrus: 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>
Link: https://lore.kernel.org/r/20240507155540.24815-10-tiwai@suse.deSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/cirrus/Makefile

 # SPDX-License-Identifier: GPL-2.0
 # EP93xx Platform Support
-snd-soc-ep93xx-objs				:= ep93xx-pcm.o
-snd-soc-ep93xx-i2s-objs	 			:= ep93xx-i2s.o
+snd-soc-ep93xx-y				:= ep93xx-pcm.o
+snd-soc-ep93xx-i2s-y	 			:= ep93xx-i2s.o
 
 obj-$(CONFIG_SND_EP93XX_SOC)			+= snd-soc-ep93xx.o
 obj-$(CONFIG_SND_EP93XX_SOC_I2S)		+= snd-soc-ep93xx-i2s.o
 
 # EP93XX Machine Support
-snd-soc-edb93xx-objs				:= edb93xx.o
+snd-soc-edb93xx-y				:= edb93xx.o
 
 obj-$(CONFIG_SND_EP93XX_SOC_EDB93XX)		+= snd-soc-edb93xx.o