Revert "FROMGIT: genirq: Retain depth for managed IRQs across CPU hotplug"

This reverts commit a7fd09ec.

Reason for revert: regressions in b/422250901; we'll fix forward on
mainline and android15-6.6

Bug: 417330473
Bug: 419054566
Bug: 422250901
Bug: 425670128
Change-Id: I88d379364d453e04a28d6e6dbfae589e2f03645f
Signed-off-by: Yuan-Jen (淵仁) Cheng <cyuanjen@google.com>
Signed-off-by: Brian Norris <briannorris@google.com>