linux-imx

reset: imx8m: Correct clock name for dispmix driver

devm_regmap_init_mmio_clk() will try to get clock by matching
clock-names property in dts with its clk_id. So the clock name
should be identical to name which clock registered. Otherwise,
devm_regmap_init_mmio_clk() will fail with -ENOENT error.

Signed-off-by: Guoniu.zhou <guoniu.zhou@nxp.com>