arm64: dts: qcom: x1e80100-romulus: Update firmware nodes

Other x1e machines use _dtbs.elf for these firmwares, which matches the
filenames shipped by Windows.

Fixes: 09d77be ("arm64: dts: qcom: Add support for X1-based Surface Laptop 7 devices")
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250108124500.44011-1-joel@jms.id.au
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

Author: shenki

arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi

@@ -1100,14 +1100,14 @@
 
 &remoteproc_adsp {
 	firmware-name = "qcom/x1e80100/microsoft/Romulus/qcadsp8380.mbn",
-			"qcom/x1e80100/microsoft/Romulus/adsp_dtb.mbn";
+			"qcom/x1e80100/microsoft/Romulus/adsp_dtbs.elf";
 
 	status = "okay";
 };
 
 &remoteproc_cdsp {
 	firmware-name = "qcom/x1e80100/microsoft/Romulus/qccdsp8380.mbn",
-			"qcom/x1e80100/microsoft/Romulus/cdsp_dtb.mbn";
+			"qcom/x1e80100/microsoft/Romulus/cdsp_dtbs.elf";
 
 	status = "okay";
 };