ARM: dts: rockchip: Drop EMMC_RSTN for edgeble-neu2

EMMC_RSTN GPIO1_A3 is connected to FSPI_CLK in Edgeble Neu2
board.

So, drop the same GPIO pin from eMMC.

Signed-off-by: Jagan Teki <jagan@edgeble.ai>
Link: https://lore.kernel.org/r/20230731103518.2906147-11-jagan@edgeble.ai


Signed-off-by: Heiko Stuebner <heiko@sntech.de>