drm/amdgpu: update amd_pcie.h to include gen4 speeds

Internal header used by the driver to specify pcie gen
speeds of the asic and chipset.

Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/include/amd_pcie.h

@@ -27,13 +27,15 @@
 #define CAIL_PCIE_LINK_SPEED_SUPPORT_GEN1        0x00010000
 #define CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2        0x00020000
 #define CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3        0x00040000
+#define CAIL_PCIE_LINK_SPEED_SUPPORT_GEN4        0x00080000
 #define CAIL_PCIE_LINK_SPEED_SUPPORT_MASK        0xFFFF0000
 #define CAIL_PCIE_LINK_SPEED_SUPPORT_SHIFT       16
 
 /* Following flags shows PCIe link speed supported by ASIC H/W.*/
 #define CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN1   0x00000001
 #define CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN2   0x00000002
 #define CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN3   0x00000004
+#define CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN4   0x00000008
 #define CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_MASK   0x0000FFFF
 #define CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_SHIFT  0