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

Those properties are no longer parsed by the driver which is being passed
those information by the core now. Let's deprecate them.

Signed-off-by: Boris Brezillon <[e-mail]>
Signed-off-by: Miquel Raynal <[e-mail]>
Link: https://lore.kernel.org/linux-mtd/[e-mail]

Documentation/devicetree/bindings/mtd/fsl-upm-nand.txt

···
 - 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>;