PCI: rockchip: Fix rockchip_pcie_ep_assert_intx() bitwise operations

Currently the bitwise operations on the u16 variable 'status' with
the setting ROCKCHIP_PCIE_EP_CMD_STATUS_IS are incorrect because
ROCKCHIP_PCIE_EP_CMD_STATUS_IS is 1UL<<19 which is wider than the
u16 variable.

Fix this by making status a u32.

Fixes: cf590b078391 ("PCI: rockchip: Add EP driver for Rockchip PCIe controller")
Signed-off-by: Colin Ian King <[e-mail]>
Signed-off-by: Lorenzo Pieralisi <[e-mail]>
Reviewed-by: Mukesh Ojha <[e-mail]>
Acked-by: Shawn Lin <[e-mail]>

drivers/pci/controller/pcie-rockchip-ep.c

···
 	struct rockchip_pcie *rockchip = &ep->rockchip;
 	u32 r = ep->max_regions - 1;
 	u32 offset;
-	u16 status;
+	u32 status;
 	u8 msg_code;
 
 	if (unlikely(ep->irq_pci_addr != ROCKCHIP_PCIE_EP_PCI_LEGACY_IRQ_ADDR ||