arm64: dts: meson-gxl: jethub-j80: Fix Bluetooth MAC node name

Node names should use hyphens instead of underscores to not cause
warnings.

Fixes: abfaae24

 ("arm64: dts: meson-gxl: add support for JetHub H1")
Suggested-by: Vyacheslav Bocharov <adeep@lexina.in>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230111211350.1461860-3-martin.blumenstingl@googlemail.com


Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>