ENGR00299756-1 ASoC: fsl_esai: Add missing clock enabler to ASoC interfaces

ENGR00299756-1 ASoC: fsl_esai: Add missing clock enabler to ASoC interfaces

All of these functions might be called before we enable the core clock in the
startup() by set_bias_level() or late_probe() in machine driver for example.
To make it safe, we here add pair of clock en/disabling to each function.

Acked-by: Wang Shengjiu <b02247@freescale.com>
Signed-off-by: Nicolin Chen <Guangyu.Chen@freescale.com>
(cherry picked from commit e6df36df2bc8062f3d1c0a19d18acc843a77619d)