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

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

This reverts commit 647194819e0740dc81946073e3e075e7c6536933.

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: 647194819e07 ("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>