arm: dts: k3: binman: Fix DM firmware selection

Just like TF-A and OP-TEE, the documentation states a custom path for DM
can be provided at build time by setting TI_DM. This should then set
ti-dm-path which updates ti-dm node filenames in binman.

Two issues prevent this from functioning for most K3 boards. One is when
then DM firmware name is inside a blob-ext node instead of a ti-dm node.

The second is when the filename in the ti-dm node is a pointer to a
blob-ext node. In this case even though the filename is updated, the
filename in the blob-ext is not, so build can fail if the default
file in the blob-ext cannot be found, even if the updated ti-dm file
does exist.

Fix both of these for all K3 by removing any indirect ti-dm nodes and
making sure all DM nodes are labeled with "ti-dm".

Signed-off-by: Andrew Davis <afd@ti.com>
Reviewed-by: Bryan Brattlof <bb@ti.com>
Reviewed-by: Neha Malcom Francis <n-francis@ti.com>
diff --git a/arch/arm/dts/k3-am625-beagleplay-u-boot.dtsi b/arch/arm/dts/k3-am625-beagleplay-u-boot.dtsi
index a067b0b..01b6a8e 100644
--- a/arch/arm/dts/k3-am625-beagleplay-u-boot.dtsi
+++ b/arch/arm/dts/k3-am625-beagleplay-u-boot.dtsi
@@ -71,13 +71,6 @@
 #define AM625_BEAGLEPLAY_DTB "dts/upstream/src/arm64/ti/k3-am625-beagleplay.dtb"
 
 &binman {
-	ti-dm {
-		filename = "ti-dm.bin";
-		blob-ext {
-			filename = "ti-dm/am62xx/ipc_echo_testb_mcu1_0_release_strip.xer5f";
-		};
-	};
-
 	tifsstub-gp {
 		filename = "tifsstub.bin_gp";
 		ti-secure-rom {
@@ -153,8 +146,8 @@
 					os = "DM";
 					load = <0x89000000>;
 					entry = <0x89000000>;
-					blob-ext {
-						filename = "ti-dm.bin";
+					ti-dm {
+						filename = "ti-dm/am62xx/ipc_echo_testb_mcu1_0_release_strip.xer5f";
 					};
 				};