arm64: dts: rockchip: Fix pinctrl node names for RK3528

arm64: dts: rockchip: Fix pinctrl node names for RK3528

Following warnings can be observed with CHECK_DTBS=y for the RK3528:

  rk3528-pinctrl.dtsi:101.36-105.5: Warning (node_name_chars_strict):
    /pinctrl/fephy/fephym0-led_dpx: Character '_' not recommended in node name
  rk3528-pinctrl.dtsi:108.38-112.5: Warning (node_name_chars_strict):
    /pinctrl/fephy/fephym0-led_link: Character '_' not recommended in node name
  rk3528-pinctrl.dtsi:115.36-119.5: Warning (node_name_chars_strict):
    /pinctrl/fephy/fephym0-led_spd: Character '_' not recommended in node name
  rk3528-pinctrl.dtsi:122.36-126.5: Warning (node_name_chars_strict):
   /pinctrl/fephy/fephym1-led_dpx: Character '_' not recommended in node name
  rk3528-pinctrl.dtsi:129.38-133.5: Warning (node_name_chars_strict):
    /pinctrl/fephy/fephym1-led_link: Character '_' not recommended in node name
  rk3528-pinctrl.dtsi:136.36-140.5: Warning (node_name_chars_strict):
    /pinctrl/fephy/fephym1-led_spd: Character '_' not recommended in node name
  rk3528-pinctrl.dtsi:782.32-790.5: Warning (node_name_chars_strict):
    /pinctrl/rgmii/rgmii-rx_bus2: Character '_' not recommended in node name
  rk3528-pinctrl.dtsi:793.32-801.5: Warning (node_name_chars_strict):
    /pinctrl/rgmii/rgmii-tx_bus2: Character '_' not recommended in node name
  rk3528-pinctrl.dtsi:804.36-810.5: Warning (node_name_chars_strict):
    /pinctrl/rgmii/rgmii-rgmii_clk: Character '_' not recommended in node name
  rk3528-pinctrl.dtsi:813.36-823.5: Warning (node_name_chars_strict):
    /pinctrl/rgmii/rgmii-rgmii_bus: Character '_' not recommended in node name

Rename the affected nodes to fix these warnings.

Fixes: a31fad19ae39 ("arm64: dts: rockchip: Add pinctrl and gpio nodes for RK3528")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://lore.kernel.org/r/20250621113859.2146400-1-jonas@kwiboo.se
Signed-off-by: Heiko Stuebner <heiko@sntech.de>