FROMGIT: ASoC: cs42l43: Store IRQ domain in codec private data

To support future refactoring store a pointer to the IRQ domain in the
codec private data allowing easier access to it outside of probe.

(cherry picked from commit c120fc5c67f606868add4a646025f67265744be3 https://github.com/CirrusLogic/linux-drivers

 v6.12-cs42l43-cs35l56)
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Message-ID: <20250903094549.271068-3-ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

Change-Id: I3e7514f2488d64d17bc5623960d6165beb36df37
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Tongtong Pan <pantongtong@huaqin.corp-partner.google.com>