drm/radeon: add pcie set/get lanes callbacks for newer asics

Uses the same functions as older asics.
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_asic.c

@@ -1468,8 +1468,8 @@ static struct radeon_asic btc_asic = {
 		.set_engine_clock = &radeon_atom_set_engine_clock,
 		.get_memory_clock = &radeon_atom_get_memory_clock,
 		.set_memory_clock = &radeon_atom_set_memory_clock,
-		.get_pcie_lanes = NULL,
-		.set_pcie_lanes = NULL,
+		.get_pcie_lanes = &r600_get_pcie_lanes,
+		.set_pcie_lanes = &r600_set_pcie_lanes,
 		.set_clock_gating = NULL,
 		.set_uvd_clocks = &evergreen_set_uvd_clocks,
 	},
@@ -1607,8 +1607,8 @@ static struct radeon_asic cayman_asic = {
 		.set_engine_clock = &radeon_atom_set_engine_clock,
 		.get_memory_clock = &radeon_atom_get_memory_clock,
 		.set_memory_clock = &radeon_atom_set_memory_clock,
-		.get_pcie_lanes = NULL,
-		.set_pcie_lanes = NULL,
+		.get_pcie_lanes = &r600_get_pcie_lanes,
+		.set_pcie_lanes = &r600_set_pcie_lanes,
 		.set_clock_gating = NULL,
 		.set_uvd_clocks = &evergreen_set_uvd_clocks,
 	},
@@ -1885,8 +1885,8 @@ static struct radeon_asic si_asic = {
 		.set_engine_clock = &radeon_atom_set_engine_clock,
 		.get_memory_clock = &radeon_atom_get_memory_clock,
 		.set_memory_clock = &radeon_atom_set_memory_clock,
-		.get_pcie_lanes = NULL,
-		.set_pcie_lanes = NULL,
+		.get_pcie_lanes = &r600_get_pcie_lanes,
+		.set_pcie_lanes = &r600_set_pcie_lanes,
 		.set_clock_gating = NULL,
 		.set_uvd_clocks = &si_set_uvd_clocks,
 	},