pci-epf-test/pci_endpoint_test: Use irq_type module parameter

Add new driver parameter to allow interruption type selection.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>