dt-bindings: bus: imx-weim: add words about continuous bclk

			devices, the presence of this property indicates that

			the weim bus should operate in Burst Clock Mode.

 - fsl,continuous-burst-clk	Make Burst Clock to output continuous clock.

			Without this option Burst Clock will output clock

			only when necessary. This takes effect only if

			"fsl,burst-clk-enable" is set.

Timing property for child nodes. It is mandatory, not optional.

 - fsl,weim-cs-timing:	The timing array, contains timing values for the