arm64: dts: meson-gxbb-vega-s95: Fix Wifi node name

bcrmf -> brcmf -> wifi

Fixes: ab5b24fd ("ARM64: dts: meson-gxbb-vega-s95: Add SD/SDIO/MMC and PWM nodes")
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>