Pass "brcm,bcm4329-fmac" to fix the following schema warnings:

imx8mp-venice-gw74xx.dtb: wifi@0: compatible: 'oneOf' conditional failed, one must be fixed:
	['cypress,cyw4373-fmac'] is too short
	'cypress,cyw4373-fmac' is not one of ['brcm,bcm4329-fmac', 'pci14e4,43dc', 'pci14e4,4464', 'pci14e4,4488', 'pci14e4,4425', 'pci14e4,4433']
	from schema $id: http://devicetree.org/schemas/net/wireless/brcm,bcm4329-fmac.yaml#

imx8mn-venice-gw7902.dtb: wifi@0: compatible: 'oneOf' conditional failed, one must be fixed:
	['brcm,bcm43455-fmac'] is too short
	'brcm,bcm43455-fmac' is not one of ['brcm,bcm4329-fmac', 'pci14e4,43dc', 'pci14e4,4464', 'pci14e4,4488', 'pci14e4,4425', 'pci14e4,4433']
	from schema $id: http://devicetree.org/schemas/net/wireless/brcm,bcm4329-fmac.yaml#Signed-off-by: Fabio Estevam <festevam@denx.de>
Acked-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>