dt-bindings: mtd: fsl-upm-nand: Deprecate chip-delay and fsl, upm-wait-flags

- fsl,upm-cmd-offset : UPM pattern offset for the command latch.

Optional properties:

- fsl,upm-wait-flags : add chip-dependent short delays after running the

	UPM pattern (0x1), after writing a data byte (0x2) or after

	writing out a buffer (0x4).

- fsl,upm-addr-line-cs-offsets : address offsets for multi-chip support.

	The corresponding address lines are used to select the chip.

- gpios : may specify optional GPIOs connected to the Ready-Not-Busy pins

	(R/B#). For multi-chip devices, "n" GPIO definitions are required

	according to the number of chips.

Deprecated properties:

- fsl,upm-wait-flags : add chip-dependent short delays after running the

	UPM pattern (0x1), after writing a data byte (0x2) or after

	writing out a buffer (0x4).

- chip-delay : chip dependent delay for transferring data from array to

	read registers (tR). Required if property "gpios" is not used

	(R/B# pins not connected).

	fsl,upm-cmd-offset = <0x08>;

	/* Multi-chip NAND device */

	fsl,upm-addr-line-cs-offsets = <0x0 0x200>;

	fsl,upm-wait-flags = <0x5>;

	chip-delay = <25>; // in micro-seconds

	nand@0 {

		#address-cells = <1>;