dt-bindings: net: qcom,ipa: Use recommended MBN firmware format in DTS example

dt-bindings: net: qcom,ipa: Use recommended MBN firmware format in DTS example

All Qualcomm firmwares uploaded to linux-firmware are in MBN format,
instead of split MDT.  No functional changes, just correct the DTS
example so people will not rely on unaccepted files.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Alex Elder <elder@kernel.org>
Link: https://patch.msgid.link/20250108120242.156201-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>