Revert "PCI: aardvark: Rewrite IRQ code to chained IRQ handler"

Revert "PCI: aardvark: Rewrite IRQ code to chained IRQ handler"

This reverts commit d07c833e4a70fbe7cb8f11775de5e2c0ca581edd.

This commit broke support for setting interrupt affinity. It looks like
that it is related to the chained IRQ handler. Revert this commit until
issue with setting interrupt affinity is fixed.

Fixes: d07c833e4a70 ("PCI: aardvark: Rewrite IRQ code to chained IRQ handler")
Link: https://lore.kernel.org/r/20220515125815.30157-1-pali@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>