arm64: dts: sdm845-db845c: make firmware filenames follow linux-firmware

Cange aDSP and cDSP firmware filenames to follow filenames merged into
linux-firmware tree. Switch from split .mdt files to merged .mbn files.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210318201405.2244723-1-dmitry.baryshkov@linaro.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/sdm845-db845c.dts

@@ -244,7 +244,7 @@ vph_pwr: vph-pwr-regulator {
 &adsp_pas {
 	status = "okay";
 
-	firmware-name = "qcom/sdm845/adsp.mdt";
+	firmware-name = "qcom/sdm845/adsp.mbn";
 };
 
 &apps_rsc {
@@ -390,7 +390,7 @@ vreg_bob: bob {
 
 &cdsp_pas {
 	status = "okay";
-	firmware-name = "qcom/sdm845/cdsp.mdt";
+	firmware-name = "qcom/sdm845/cdsp.mbn";
 };
 
 &dsi0 {