dt-bindings: xilinx: Remove Naga from memory and mtd bindings

Naga is no longer works for AMD/Xilinx and there is no activity from him to
continue to maintain Xilinx related drivers. Two drivers have Miquel as
maintainer and for the last one add myself instead to be kept in a loop if
there is any change required.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/6b4cdc7158599b4a38409a03eda56e38975b6233.1683103250.git.michal.simek@amd.com
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/memory-controllers/arm,pl35x-smc.yaml

@@ -8,7 +8,6 @@ title: Arm PL35x Series Static Memory Controller (SMC)
 
 maintainers:
   - Miquel Raynal <miquel.raynal@bootlin.com>
-  - Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>
 
 description: |
   The PL35x Static Memory Controller is a bus where you can connect two kinds

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

@@ -10,7 +10,7 @@ allOf:
   - $ref: "nand-controller.yaml"
 
 maintainers:
-  - Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>
+  - Michal Simek <michal.simek@amd.com>
 
 properties:
   compatible:

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

@@ -11,7 +11,6 @@ allOf:
 
 maintainers:
   - Miquel Raynal <miquel.raynal@bootlin.com>
-  - Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>
 
 properties:
   compatible: