arm64: dts: rockchip: kill pcie_clkreqn and pcie_clkreqnb for rk3399

Kill these two pinctrl reference totally from rk3399 as it
never work indeed.
Signed-off-by: NShawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399.dtsi

@@ -2119,16 +2119,6 @@
 		};
 
 		pcie {
-			pcie_clkreqn: pci-clkreqn {
-				rockchip,pins =
-					<2 26 RK_FUNC_2 &pcfg_pull_none>;
-			};
-
-			pcie_clkreqnb: pci-clkreqnb {
-				rockchip,pins =
-					<4 24 RK_FUNC_1 &pcfg_pull_none>;
-			};
-
 			pcie_clkreqn_cpm: pci-clkreqn-cpm {
 				rockchip,pins =
 					<2 RK_PD2 RK_FUNC_GPIO &pcfg_pull_none>;