PCI: dw-rockchip: Endpoint mode cannot raise INTx interrupts

PCI: dw-rockchip: Endpoint mode cannot raise INTx interrupts

Neither RK3568 or RK3588 supports INTx interrupts.

Since epc_features is zero initialized, this is strictly not needed.
However, setting intx_capable explicitly to false makes it more clear
that neither RK3568 or RK3588 supports INTx interrupts.

No functional change.

Signed-off-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Link: https://lore.kernel.org/r/20250310111016.859445-14-cassel@kernel.org