ASoC: spear: Normalise module names

# SPEAR Platform Support

obj-$(CONFIG_SND_SPEAR_SOC) += spear_pcm.o

obj-$(CONFIG_SND_SPEAR_SPDIF_IN) += spdif_in.o

obj-$(CONFIG_SND_SPEAR_SPDIF_OUT) += spdif_out.o

snd-soc-spear-pcm-objs := spear_pcm.o

snd-soc-spear-spdif-in-objs := spdif_in.o

snd-soc-spear-spdif-out-objs := spdif_out.o

obj-$(CONFIG_SND_SPEAR_SOC) += snd-soc-spear-pcm.o

obj-$(CONFIG_SND_SPEAR_SPDIF_IN) += snd-soc-spear-spdif-in.o

obj-$(CONFIG_SND_SPEAR_SPDIF_OUT) += snd-soc-spear-spdif-out.o