MAINTAINERS: Add Pali Rohár as aardvark PCI maintainer

Link: https://lore.kernel.org/r/20200925092115.16546-1-pali@kernel.org


Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thomas Petazzzoni <thomas.petazzoni@bootlin.com>