ASoC: lm49453: Fix mask for setting mode bit in lm49453_set_dai_fmt()

The mode variable is either 0 or 1.
To update mode setting, the mask should be BIT(0) rather than BIT(1).

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Tested-by: Omair M. Abdullah <omair.m.abdullah@intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>