ASoC: q6dsp: q6apm: make g_apm static

This patch fixes the following sprse warning:

sound/soc/qcom/qdsp6/q6apm.c:30:14: sparse: warning: symbol 'g_apm' was not declared. Should it be static?

No functional change intended

Signed-off-by: Min-Hua Chen <minhuadotchen@gmail.com>
Link: https://lore.kernel.org/r/20230713151744.86072-1-minhuadotchen@gmail.com


Signed-off-by: Mark Brown <broonie@kernel.org>