It's supposed to be there and it's needed for proper validation of DTS
files.

This fixes following errors for Northstar based TP-Link routers:

arch/arm/boot/dts/bcm47081-tplink-archer-c5-v2.dtb: flash@0: partitions: 'oneOf' conditional failed, one must be fixed:
        'partition-file-system', 'partition-os-image', 'partitions-table-offset' do not match any of the regexes: 'pinctrl-[0-9]+'
        '#address-cells' is a required property
        '#size-cells' is a required property
        'partition-file-system', 'partition-os-image', 'partitions-table-offset' do not match any of the regexes: '^partition@[0-9a-f]+$', 'pinctrl-[0-9]+'
        'partition-file-system', 'partition-os-image', 'partitions-table-offset' do not match any of the regexes: '^partition-[0-9a-z]+$', 'pinctrl-[0-9]+'
        'fis-index-block' is a required property
        arch/arm/boot/dts/bcm47081-tplink-archer-c5-v2.dtb: flash@0: partitions:compatible: 'oneOf' conditional failed, one must be fixed:
                ['tplink,safeloader-partitions'] is too short
                'fixed-partitions' was expected
                'sercomm,sc-partitions' was expected
        'arm,arm-firmware-suite' was expected
        'brcm,bcm4908-partitions' was expected
        'brcm,bcm947xx-cfe-partitions' was expected
        'linksys,ns-partitions' was expected
        'qcom,smem-part' was expected
        'redboot-fis' was expected
        From schema: Documentation/devicetree/bindings/mtd/mtd.yaml
arch/arm/boot/dts/bcm47081-tplink-archer-c5-v2.dtb: flash@0: partitions: Unevaluated properties are not allowed ('partitions-table-offset' was unexpected)
        From schema: Documentation/devicetree/bindings/mtd/mtd.yaml
arch/arm/boot/dts/bcm47081-tplink-archer-c5-v2.dtb: flash@0: partitions: 'oneOf' conditional failed, one must be fixed:
        'partition-file-system', 'partition-os-image', 'partitions-table-offset' do not match any of the regexes: 'pinctrl-[0-9]+'
        '#address-cells' is a required property
        '#size-cells' is a required property
        'partition-file-system', 'partition-os-image', 'partitions-table-offset' do not match any of the regexes: '^partition@[0-9a-f]+$', 'pinctrl-[0-9]+'
        'partition-file-system', 'partition-os-image', 'partitions-table-offset' do not match any of the regexes: '^partition-[0-9a-z]+$', 'pinctrl-[0-9]+'
        'fis-index-block' is a required property
        arch/arm/boot/dts/bcm47081-tplink-archer-c5-v2.dtb: flash@0: partitions:compatible: 'oneOf' conditional failed, one must be fixed:
                ['tplink,safeloader-partitions'] is too short
                'fixed-partitions' was expected
                'sercomm,sc-partitions' was expected
        'arm,arm-firmware-suite' was expected
        'brcm,bcm4908-partitions' was expected
        'brcm,bcm947xx-cfe-partitions' was expected
        'linksys,ns-partitions' was expected
        'qcom,smem-part' was expected
        'redboot-fis' was expected
        From schema: Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
arch/arm/boot/dts/bcm47081-tplink-archer-c5-v2.dtb: flash@0: partitions: Unevaluated properties are not allowed ('partitions-table-offset' was unexpected)
        From schema: Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
arch/arm/boot/dts/bcm47081-tplink-archer-c5-v2.dtb: flash@0: Unevaluated properties are not allowed ('partitions' was unexpected)
        From schema: Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20230602215629.2568-1-zajec5@gmail.com