arm64: dts: rockchip: remove extra assigned-clocks property from &gmac2phy node in rk3328-evb.dts

There are 2 'assigned-clocks' properties in the '&gmac2phy'
node in 'rk3328-evb.dts', so remove one of them.

Info from clk-rk3328.c:

MUXGRF(SCLK_MAC2PHY, "clk_mac2phy", mux_mac2phy_src_p,
CLK_SET_RATE_NO_REPARENT,
RK3328_GRF_MAC_CON2, 10, 1, MFLAGS),
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20200425122345.12902-1-jbx6244@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3328-evb.dts

@@ -82,7 +82,6 @@ &emmc {
 &gmac2phy {
 	phy-supply = <&vcc_phy>;
 	clock_in_out = "output";
-	assigned-clocks = <&cru SCLK_MAC2PHY_SRC>;
 	assigned-clock-rate = <50000000>;
 	assigned-clocks = <&cru SCLK_MAC2PHY>;
 	assigned-clock-parents = <&cru SCLK_MAC2PHY_SRC>;