linux-phytec-ti

misc: pci_endpoint_test: Enable legacy interrupt

PCI core does not enable legacy interrupt if it finds MSI or
MSIX interrupt. Explicitly enable legacy interrupt here in order
to perform legacy interrupt tests.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>