[PATCH] ARM: dts: imx7s: correct iomuxc gpr mux controller cells

[Marco Felsch]

On 22-12-23, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan at nxp.com>
> 
> Per binding doc reg-mux.yaml, the #mux-control-cells should be 1
> 
> Signed-off-by: Peng Fan <peng.fan at nxp.com>

Reviewed-by: Marco Felsch <m.felsch at pengutronix.de>