ALSA: hda: Remove duplicate cmedia entries in codecs Makefile

ALSA: hda: Remove duplicate cmedia entries in codecs Makefile

kconfiglint reports:

  M004: 'snd-hda-codec-cmedia-y' assigned with ':=' but was already
        assigned at line 5; previous value is overwritten

sound/hda/codecs/Makefile contains duplicate entries for the C-Media
codec driver — both the composite module definition and the obj-* build
target appear twice:

  Line 5:  snd-hda-codec-cmedia-y :=  cmedia.o
  Line 10: snd-hda-codec-cmedia-y :=  cmedia.o  (duplicate)
  Line 24: obj-$(CONFIG_SND_HDA_CODEC_CMEDIA) += snd-hda-codec-cmedia.o
  Line 29: obj-$(CONFIG_SND_HDA_CODEC_CMEDIA) += snd-hda-codec-cmedia.o  (duplicate)

This file was created by commit 6014e9021b28 ("ALSA: hda: Move codec
drivers into sound/hda/codecs directory") which
moved codec drivers from sound/pci/hda/ to sound/hda/codecs/. In that
initial file, cmedia appeared once in each section.

Immediately after, commit aeeb85f26c3b ("ALSA: hda: Split Realtek
HD-audio codec driver") reordered the entries and
inserted cmedia at new positions near the top of each section, as part
of splitting out the Realtek driver. However, the original cmedia entries
were not removed during this reordering, creating duplicates of both
lines. The second assignment harmlessly overwrites the first with the
same value, and the second obj-* line causes the module to be listed
twice — neither causes a build failure, but both are dead code.

Remove the duplicate entries (second occurrence of each).

Assisted-by: Claude:claude-opus-4-6 kconfiglint
Signed-off-by: Sasha Levin <sashal@kernel.org>
Link: https://patch.msgid.link/20260426000327.56079-1-sashal@kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>