mb/starlabs/starbook/adl: Enable PchHdaSdiEnable

This is required for the HDA device to work.

Change-Id: I5fd3617c4cb1e69b7e0ecf6cddf4c143da99b927
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78201
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/starlabs/starbook/variants/adl/devicetree.cb

@@ -172,6 +172,7 @@ chip soc/intel/alderlake
 			end
 		end
 		device ref hda		on
+			register "pch_hda_sdi_enable[0]"		= "1"
 			register "pch_hda_audio_link_hda_enable"	= "1"
 			register "pch_hda_idisp_codec_enable"		= "1"
 			register "pch_hda_idisp_link_frequency"		= "HDA_LINKFREQ_96MHZ"