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dt-bindings: net: dsa: microchip: Make pinctrl 'reset' optional

Commit e469b87e0fb0d ("dt-bindings: net: dsa: microchip: Add strap
description to set SPI mode") required both 'default' and 'reset' pinctrl
states for all compatible devices. However, this requirement should be only
applicable to KSZ8463.

Make the 'reset' pinctrl state optional for all other Microchip DSA
devices while keeping it mandatory for KSZ8463.

Fix below CHECK_DTBS warnings:
arch/arm64/boot/dts/freescale/imx8mp-skov-basic.dtb: switch@5f (microchip,ksz9893): pinctrl-names: ['default'] is too short
from schema $id: http://devicetree.org/schemas/net/dsa/microchip,ksz.yaml#

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260106143620.126212-1-Frank.Li@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

authored by

Frank Li and committed by
Jakub Kicinski f56bcc04 59ba823e

+3
+3
Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
··· 40 40 - const: reset 41 41 description: 42 42 Used during reset for strap configuration. 43 + minItems: 1 43 44 44 45 reset-gpios: 45 46 description: ··· 154 153 const: microchip,ksz8463 155 154 then: 156 155 properties: 156 + pinctrl-names: 157 + minItems: 2 157 158 straps-rxd-gpios: 158 159 description: 159 160 RXD0 and RXD1 pins, used to select SPI as bus interface.