Avoid build errors when CONFIG_COMMON_CLK is not set/enabled.

ERROR: modpost: "__clk_get_name" [sound/soc/fsl/snd-soc-fsl-utils.ko] undefined!

Fixes: 7bad8125 ("ASoC: fsl_utils: Add function to handle PLL clock source")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1657507190-14546-1-git-send-email-shengjiu.wang@nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>