ASoC: max98504: Add missing MAX98504 on SND_SOC_ALL_CODECS

commit 4c5d1469 ("ASoC: max98504: Add max98504 speaker amplifier
driver") added new max98504, but this patch didn't add it to
SND_SOC_ALL_CODECS. This patch adds it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>