dt-bindings: remoteproc: qcom,sm6115-pas: 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: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250226145103.10839-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

Author: krzk

Documentation/devicetree/bindings/remoteproc/qcom,sm6115-pas.yaml

@@ -127,7 +127,7 @@ examples:
         clocks = <&rpmcc RPM_SMD_XO_CLK_SRC>;
         clock-names = "xo";
 
-        firmware-name = "qcom/sm6115/adsp.mdt";
+        firmware-name = "qcom/sm6115/adsp.mbn";
 
         interrupts-extended = <&intc GIC_SPI 282 IRQ_TYPE_EDGE_RISING>,
                               <&adsp_smp2p_in 0 IRQ_TYPE_EDGE_RISING>,