PCI: Remove unnecessary <linux/of_irq.h> includes

Many host controller drivers #include <linux/of_irq.h> even though they
don't need it.  Remove the unnecessary #includes.

Link: https://lore.kernel.org/r/20221031153954.1163623-6-helgaas@kernel.org


Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Roy Zang <roy.zang@nxp.com>