[PATCH] PCI: rockchip-ep: Mark RK3399 as intx_capable

[Krzysztof Wilczyński]

Hello,

> RK3399 can raise INTx interrupts, as can be seen by
> rockchip_pcie_ep_send_intx_irq().
> 
> This is also in line with the register description of
> PCIE_CLIENT_LEGACY_INT_CTRL, section "17.6.3 PCIe Client Detail Register
> Description" of the RK3399 TRM.
> 
> Thus, mark RK3399 as intx_capable.

Replaced the following commit:

  e55c67837a8c ("PCI: dw-rockchip: Endpoint mode cannot raise INTx interrupts")

With this one directly on the "endpoint-test" branch.  This is per the
conversation at:

  https://lore.kernel.org/linux-pci/20250318103330.1840678-6-cassel@kernel.org

Thank you!

	Krzysztof