[U-Boot] rockchip: clk: rk3288: handle clk_enable requests for GMAC

[Philipp Tomsich]

> Since b0ba1e7e9d9b9441a18048ec67a3b3100c096975
> (rockchip: clk: rk3288: add clk_enable function and support USB HOST0/HSIC)
> Ethernet no longer probes on RK3288.
> 
> Add no-ops for GMAC clocks observed to be requested which match the
> clk_enable cases in RK3368 and RK3399.
> 
> Signed-off-by: Jonathan Gray <jsg at jsg.id.au>
> Cc: Wadim Egorov <w.egorov at phytec.de>
> Cc: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> Acked-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> ---
>  drivers/clk/rockchip/clk_rk3288.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 

Applied to u-boot-rockchip, thanks!