ASoC: rt5645: Fixed typo for buddy jack support.

Had a typo in e7cfd86 that resulted in buddy jack support not being
fixed.

Fixes: e7cfd86 ("ASoC: rt5645: Fixed buddy jack support.")
Signed-off-by: Jacob Rasmussen <jacobraz@google.com>
Reviewed-by: Ross Zwisler <zwisler@google.com>
Cc: <jacobraz@google.com>
CC: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20191114232011.165762-1-jacobraz@google.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt5645.c

@@ -3271,7 +3271,7 @@ static void rt5645_jack_detect_work(struct work_struct *work)
 				    report, SND_JACK_MICROPHONE);
 		return;
 	case 4:
-		val = snd_soc_component_read32(rt5645->component, RT5645_A_JD_CTRL1) & 0x002;
+		val = snd_soc_component_read32(rt5645->component, RT5645_A_JD_CTRL1) & 0x0020;
 		break;
 	default: /* read rt5645 jd1_1 status */
 		val = snd_soc_component_read32(rt5645->component, RT5645_INT_IRQ_ST) & 0x1000;