PCI: rockchip: Remove redundant PCIe message routing definitions

The Rockchip driver contains duplicated message routing and INTx code
definitions (e.g., ROCKCHIP_PCIE_MSG_ROUTING_TO_RC,
ROCKCHIP_PCIE_MSG_CODE_ASSERT_INTA). These are already provided by the
PCI core in drivers/pci/pci.h as PCIE_MSG_TYPE_R_RC and
PCIE_MSG_CODE_ASSERT_INTA, respectively.

Remove the driver-specific definitions in favor of the core definitions
instead. This aligns the driver with the PCIe specification and reduces
maintenance overhead.

Signed-off-by: Hans Zhang <18255117159@163.com>
[mani: commit message rewording]
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20250607154913.805027-3-18255117159@163.com

Author: Hans Zhang

drivers/pci/controller/pcie-rockchip.h

@@ -215,20 +215,6 @@
 #define RC_REGION_0_TYPE_MASK			GENMASK(3, 0)
 #define MAX_AXI_WRAPPER_REGION_NUM		33
 
-#define ROCKCHIP_PCIE_MSG_ROUTING_TO_RC		0x0
-#define ROCKCHIP_PCIE_MSG_ROUTING_VIA_ADDR		0x1
-#define ROCKCHIP_PCIE_MSG_ROUTING_VIA_ID		0x2
-#define ROCKCHIP_PCIE_MSG_ROUTING_BROADCAST		0x3
-#define ROCKCHIP_PCIE_MSG_ROUTING_LOCAL_INTX		0x4
-#define ROCKCHIP_PCIE_MSG_ROUTING_PME_ACK		0x5
-#define ROCKCHIP_PCIE_MSG_CODE_ASSERT_INTA		0x20
-#define ROCKCHIP_PCIE_MSG_CODE_ASSERT_INTB		0x21
-#define ROCKCHIP_PCIE_MSG_CODE_ASSERT_INTC		0x22
-#define ROCKCHIP_PCIE_MSG_CODE_ASSERT_INTD		0x23
-#define ROCKCHIP_PCIE_MSG_CODE_DEASSERT_INTA		0x24
-#define ROCKCHIP_PCIE_MSG_CODE_DEASSERT_INTB		0x25
-#define ROCKCHIP_PCIE_MSG_CODE_DEASSERT_INTC		0x26
-#define ROCKCHIP_PCIE_MSG_CODE_DEASSERT_INTD		0x27
 #define ROCKCHIP_PCIE_MSG_ROUTING_MASK			GENMASK(7, 5)
 #define ROCKCHIP_PCIE_MSG_ROUTING(route) \
 	(((route) << 5) & ROCKCHIP_PCIE_MSG_ROUTING_MASK)