Documentation: dt: mtd: replace "nor-jedec" binding with "jedec, spi-nor"

In commit 8ff16cf77ce3 ("Documentation: devicetree: m25p80: add "nor-jedec"
binding"), we added a generic "nor-jedec" binding to catch all
mostly-compatible SPI NOR flash which can be detected via the READ ID
opcode (0x9F). This was discussed and reviewed at the time, however
objections have come up since then as part of this discussion:

http://lkml.kernel.org/g/20150511224646.GJ32500@ld-irv-0074

It seems the parties involved agree that "jedec,spi-nor" does a better
job of capturing the fact that this is SPI-specific, not just any NOR
flash.

This binding was only merged for v4.1-rc1, so it's still OK to change
the naming.

At the same time, let's move the documentation to a better name.

Next up: stop referring to code (drivers/mtd/devices/m25p80.c) from the
documentation.

Signed-off-by: Brian Norris <[e-mail]>
Cc: Marek Vasut <[e-mail]>
Cc: Rafał Miłecki <[e-mail]>
Cc: Rob Herring <[e-mail]>
Cc: Pawel Moll <[e-mail]>
Cc: Ian Campbell <[e-mail]>
Cc: Kumar Gala <[e-mail]>
Cc: [e-mail]
Acked-by: Stephen Warren <[e-mail]>
Acked-by: Geert Uytterhoeven <[e-mail]>
Acked-by: Mark Rutland <[e-mail]>

Documentation/devicetree/bindings/mtd/m25p80.txt Documentation/devicetree/bindings/mtd/jedec,spi-nor.txt

···
                is not Linux-only, but in case of Linux, see the "m25p_ids"
                table in drivers/mtd/devices/m25p80.c for the list of supported
                chips.
-               Must also include "nor-jedec" for any SPI NOR flash that can be
-               identified by the JEDEC READ ID opcode (0x9F).
+               Must also include "jedec,spi-nor" for any SPI NOR flash that can
+               be identified by the JEDEC READ ID opcode (0x9F).
 - reg : Chip-Select number
 - spi-max-frequency : Maximum frequency of the SPI bus the chip can operate at
 
···
 	flash: m25p80@0 {
 		#address-cells = <1>;
 		#size-cells = <1>;
-		compatible = "spansion,m25p80", "nor-jedec";
+		compatible = "spansion,m25p80", "jedec,spi-nor";
 		reg = <0>;
 		spi-max-frequency = <40000000>;
 		m25p,fast-read;

drivers/mtd/devices/m25p80.c

···
 	 */
 	if (data && data->type)
 		flash_name = data->type;
-	else if (!strcmp(spi->modalias, "nor-jedec"))
+	else if (!strcmp(spi->modalias, "spi-nor"))
 		flash_name = NULL; /* auto-detect */
 	else
 		flash_name = spi->modalias;
···
  * since most of these flash are compatible to some extent, and their
  * differences can often be differentiated by the JEDEC read-ID command, we
  * encourage new users to add support to the spi-nor library, and simply bind
- * against a generic string here (e.g., "nor-jedec").
+ * against a generic string here (e.g., "jedec,spi-nor").
  *
  * Many flash names are kept here in this list (as well as in spi-nor.c) to
  * keep them available as module aliases for existing platforms.
···
 	 * Generic support for SPI NOR that can be identified by the JEDEC READ
 	 * ID opcode (0x9F). Use this, if possible.
 	 */
-	{"nor-jedec"},
+	{"spi-nor"},
 	{ },
 };
 MODULE_DEVICE_TABLE(spi, m25p_ids);