arm64: dts: meson-gxl-p230: fix ethernet PHY interrupt number

Correct the interrupt number assigned to the Realtek PHY in the p230

following the same logic as commit 3106507e1004 ("ARM64: dts: meson-gxm:
fix q200 interrupt number"),as reported in [PATCH 0/2] Ethernet PHY
interrupt improvements [1].

[1] https://lore.kernel.org/all/20171202214037.17017-1-martin.blumenstingl@googlemail.com/

Fixes: b94d22d94ad2 ("ARM64: dts: meson-gx: add external PHY interrupt on some platforms")
Signed-off-by: Jun Yan <jerrysteve1101@gmail.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://patch.msgid.link/20260330145111.115318-1-jerrysteve1101@gmail.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

[ upstream commit: 174a0ef3b33434f475c87e66f37980e39b73805a ]