ASoC: rt5682: Report the button event in the headset type only

The irq work will be manipulated by resume function, and it will report
the wrong jack type while the jack type is headphone in the button event.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Link: https://lore.kernel.org/r/20200716030123.27122-1-oder_chiou@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>