spi: dt-bindings: Drop Pratyush Yadav

Emails to Pratyush Yadav bounce ("550 Invalid recipient").  Generic SPI
properties should be maintained by subsystem maintainer (Mark).  Add
recent contributor Vaishnav Achath to the Cadence SPI bindings.
Signed-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220811063826.7620-1-krzysztof.kozlowski@linaro.orgSigned-off-by: NMark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/spi/cdns,qspi-nor-peripheral-props.yaml

@@ -10,7 +10,7 @@ description:
   See spi-peripheral-props.yaml for more info.
 
 maintainers:
-  - Pratyush Yadav <p.yadav@ti.com>
+  - Vaishnav Achath <vaishnav.a@ti.com>
 
 properties:
   # cdns,qspi-nor.yaml

Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml

@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: Cadence Quad SPI controller
 
 maintainers:
-  - Pratyush Yadav <p.yadav@ti.com>
+  - Vaishnav Achath <vaishnav.a@ti.com>
 
 allOf:
   - $ref: spi-controller.yaml#

Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml

@@ -16,7 +16,7 @@ description:
   their own separate schema that should be referenced from here.
 
 maintainers:
-  - Pratyush Yadav <p.yadav@ti.com>
+  - Mark Brown <broonie@kernel.org>
 
 properties:
   reg: