arm64: dts: rockchip: Fix the num-lanes of pcie3x4 on Cool Pi CM5 EVB

The 4 lane pcie30 phy is shared by pcie3x4 and pcie3x2, so
the num-lanes of pcie3x4 should be 2.

Fixes: 791c154c ("arm64: dts: rockchip: Add support for rk3588 based board Cool Pi CM5 EVB")
Signed-off-by: Andy Yan <andyshrk@163.com>
Link: https://lore.kernel.org/r/20240201121106.1471301-4-andyshrk@163.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3588-coolpi-cm5-evb.dts

@@ -114,6 +114,7 @@ &pcie30phy {
 	status = "okay";
 };
 
+/* Standard pcie */
 &pcie3x2 {
 	reset-gpios = <&gpio3 RK_PB0 GPIO_ACTIVE_HIGH>;
 	vpcie3v3-supply = <&vcc3v3_sys>;
@@ -122,6 +123,7 @@ &pcie3x2 {
 
 /* M.2 M-Key ssd */
 &pcie3x4 {
+	num-lanes = <2>;
 	reset-gpios = <&gpio4 RK_PB6 GPIO_ACTIVE_HIGH>;
 	vpcie3v3-supply = <&vcc3v3_sys>;
 	status = "okay";