ASoC: rt5645: polling jd status in all conditions

We only polling jd status when rt5645->pdata.jd_invert is true.
However, it should be done at all time since there will be no
interrupt for jd if we press a headset button and remove the
headset at the same time.

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>