[U-Boot] [PATCH 3/4] arm: mxs: be more careful when enabling gpmi_clk

[sbabic at denx.de]

> The data sheet says that the DIV field cannot change while the CLKGATE
> bit is set or modified. So do it a little more carefully, by first
> clearing the bit, waiting for that to appear, then setting the DIV
> field.
> Signed-off-by: Rasmus Villemoes <rasmus.villemoes at prevas.dk>
Applied to u-boot-imx, -next, thanks !

Best regards,
Stefano Babic

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