ASoC: SOF: Intel: Initialize chip in hda_sdw_check_wakeen_irq()

Clang warns (or errors with CONFIG_WERROR):

sound/soc/sof/intel/hda.c:423:6: error: variable 'chip' is uninitialized when used here [-Werror,-Wuninitialized]
423 | if (chip && chip->check_sdw_wakeen_irq)
| ^~~~
sound/soc/sof/intel/hda.c:418:39: note: initialize the variable 'chip' to silence this warning
418 | const struct sof_intel_dsp_desc *chip;
| ^
| = NULL
1 error generated.

Add the missing initialization, following the pattern of the other irq
functions.

Fixes: 9362ab78f175 ("ASoC: SOF: Intel: add abstraction for SoundWire wake-ups")
Signed-off-by: Nathan Chancellor <[e-mail]>
Acked-by: Pierre-Louis Bossart <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/sof/intel/hda.c

···
 	if (!(interface_mask & BIT(SOF_DAI_INTEL_ALH)))
 		return false;
 
+	chip = get_chip_info(sdev->pdata);
 	if (chip && chip->check_sdw_wakeen_irq)
 		return chip->check_sdw_wakeen_irq(sdev);