dt-bindings: mtd: Drop unneeded quotes

Cleanup bindings dropping unneeded quotes. Once all these are fixed,
checking for this can be enabled in yamllint.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de> #rockchip
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20230317233631.3968509-1-robh@kernel.org

Author: robherring

Documentation/devicetree/bindings/mtd/allwinner,sun4i-a10-nand.yaml

@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: Allwinner A10 NAND Controller
 
 allOf:
-  - $ref: "nand-controller.yaml"
+  - $ref: nand-controller.yaml
 
 maintainers:
   - Chen-Yu Tsai <wens@csie.org>

Documentation/devicetree/bindings/mtd/arasan,nand-controller.yaml

@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: Arasan NAND Flash Controller with ONFI 3.1 support
 
 allOf:
-  - $ref: "nand-controller.yaml"
+  - $ref: nand-controller.yaml
 
 maintainers:
   - Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>

Documentation/devicetree/bindings/mtd/arm,pl353-nand-r2p1.yaml

@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: PL353 NAND Controller
 
 allOf:
-  - $ref: "nand-controller.yaml"
+  - $ref: nand-controller.yaml
 
 maintainers:
   - Miquel Raynal <miquel.raynal@bootlin.com>

Documentation/devicetree/bindings/mtd/gpmi-nand.yaml

@@ -93,7 +93,7 @@ required:
 unevaluatedProperties: false
 
 allOf:
-  - $ref: "nand-controller.yaml"
+  - $ref: nand-controller.yaml
 
   - if:
       properties:

Documentation/devicetree/bindings/mtd/intel,lgm-ebunand.yaml

@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: Intel LGM SoC NAND Controller
 
 allOf:
-  - $ref: "nand-controller.yaml"
+  - $ref: nand-controller.yaml
 
 maintainers:
   - Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@linux.intel.com>

Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml

@@ -10,7 +10,7 @@ maintainers:
   - Rob Herring <robh@kernel.org>
 
 allOf:
-  - $ref: "mtd.yaml#"
+  - $ref: mtd.yaml#
   - $ref: /schemas/spi/spi-peripheral-props.yaml#
 
 properties:

Documentation/devicetree/bindings/mtd/mtd-physmap.yaml

@@ -14,7 +14,7 @@ description: |
   file systems on embedded devices.
 
 allOf:
-  - $ref: "mtd.yaml#"
+  - $ref: mtd.yaml#
   - $ref: /schemas/memory-controllers/mc-peripheral-props.yaml#
 
 properties:

Documentation/devicetree/bindings/mtd/mxc-nand.yaml

@@ -10,7 +10,7 @@ maintainers:
   - Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
 
 allOf:
-  - $ref: "nand-controller.yaml"
+  - $ref: nand-controller.yaml
 
 properties:
   compatible:

Documentation/devicetree/bindings/mtd/nand-chip.yaml

@@ -10,7 +10,7 @@ maintainers:
   - Miquel Raynal <miquel.raynal@bootlin.com>
 
 allOf:
-  - $ref: "mtd.yaml#"
+  - $ref: mtd.yaml#
 
 description: |
   This file covers the generic description of a NAND chip. It implies that the

Documentation/devicetree/bindings/mtd/nand-controller.yaml

@@ -51,7 +51,7 @@ properties:
 
 patternProperties:
   "^nand@[a-f0-9]$":
-    $ref: "nand-chip.yaml#"
+    $ref: nand-chip.yaml#
 
     properties:
       reg: