ASoC: fsl_esai: Fix missing break in switch statement

ASoC: fsl_esai: Fix missing break in switch statement

commit 903c220b1ece12f17c868e43f2243b8f81ff2d4c upstream.

case ESAI_HCKT_EXTAL and case ESAI_HCKR_EXTAL should be
independent of each other, so replace fall-through with break.

Fixes: 43d24e76b698 ("ASoC: fsl_esai: Add ESAI CPU DAI driver")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>