hdac: Handle interrupts racing with device suspend

hdac: Handle interrupts racing with device suspend

- Avoid looping forever if a concurrent reset causes a read of the
  interrupt status register to return all ones.
- Lock the softc before reading the interrupt status, so as to avoid a
  similar infinite loop in hdac_one_intr().

This fixes suspend-to-S3 on some laptops.

Approved by:	re (gjb)
PR:		261207
Reviewed by:	mav, imp
Tested by:	uqs
Sponsored by:	The FreeBSD Foundation

(cherry picked from commit 077564cfdb7285ff7d256424715e563cbac36f8b)
(cherry picked from commit 18a3bada308d89928f170f4098c85cd3f11db864)