arm: dts: k3-*-binman: Move to using ti-dm entry type

Move the DM entry in tispl.bin FIT image from default fetching an
external blob entry to fetching using ti-dm entry type. This way, the
DM entry will be populated by the TI_DM pathname if provided. Else it
will resort to the ti-dm.bin file.

Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
Reviewed-by: Andrew Davis <afd@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/k3-j721e-binman.dtsi b/arch/arm/dts/k3-j721e-binman.dtsi
index 5ddb474..dbc385a 100644
--- a/arch/arm/dts/k3-j721e-binman.dtsi
+++ b/arch/arm/dts/k3-j721e-binman.dtsi
@@ -151,7 +151,7 @@
 						content = <&dm>;
 						keyfile = "custMpk.pem";
 					};
-					dm: blob-ext {
+					dm: ti-dm {
 						filename = "ti-dm.bin";
 					};
 				};
@@ -282,7 +282,7 @@
 		fit {
 			images {
 				dm {
-					blob-ext {
+					ti-dm {
 						filename = "ti-dm.bin";
 					};
 				};