arm64: dts: meson: remove broadcom wifi compatible from GX reference boards

arm64: dts: meson: remove broadcom wifi compatible from GX reference boards

Amlogic GX reference boards shipped with Broadcom SDIO modules and
this is described in device-tree files. These boards are rare, but
their device-trees are commonly used to boot no-name Android STB's
that closely follow the vendor reference design. For cost reasons
these boxes often use non-Broadcom RTL8189ES/FS and QCA9377 SDIO
modules, and for availability reasons the chipset/module used can
change between batches of the same device.

Testing shows the only requirement for WiFi driver probe and load
is presence of the correct 'reg' value, and all Amlogic boards use
the same <1> value. Removing the 'brcm,bcm4329-fmac' compatible
allows a wider range of Android STB boards to boot from reference
design device-trees and have working WiFi. Also convert the 'brcmf'
node name to a more generic 'sdio' to reflect we are not always
using the Broadcom brcmfmac driver now.

Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Link: https://lore.kernel.org/r/20241127043358.3799737-1-christianshewitt@gmail.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>