arm: mach-k3: Move K3 degenerate keys out of board folder

This file is common for all of K3, move it out of board/ directory and
into mach-k3. And change the relative paths to absolute paths in the
binman paths.

While at it, drop the reference in verdin-binman file which is
redundant.

Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Andrew Davis <afd@ti.com>
diff --git a/arch/arm/dts/k3-am625-verdin-wifi-dev-binman.dtsi b/arch/arm/dts/k3-am625-verdin-wifi-dev-binman.dtsi
index 089b2a5..274b699 100644
--- a/arch/arm/dts/k3-am625-verdin-wifi-dev-binman.dtsi
+++ b/arch/arm/dts/k3-am625-verdin-wifi-dev-binman.dtsi
@@ -9,10 +9,6 @@
 	filename = "../../ti/keys/custMpk.pem";
 };
 
-&dkey_pem {
-	filename = "../../ti/keys/ti-degenerate-key.pem";
-};
-
 #ifndef CONFIG_ARM64
 
 &bcfg_yaml {
diff --git a/arch/arm/dts/k3-binman.dtsi b/arch/arm/dts/k3-binman.dtsi
index 2ea2dd1..db3f1cf 100644
--- a/arch/arm/dts/k3-binman.dtsi
+++ b/arch/arm/dts/k3-binman.dtsi
@@ -20,7 +20,7 @@
 	ti-degenerate-key {
 		filename = "ti-degenerate-key.pem";
 		dkey_pem: blob-ext {
-			filename = "../keys/ti-degenerate-key.pem";
+			filename = "arch/arm/mach-k3/keys/ti-degenerate-key.pem";
 		};
 	};
 };
diff --git a/board/ti/keys/ti-degenerate-key.pem b/arch/arm/mach-k3/keys/ti-degenerate-key.pem
similarity index 100%
rename from board/ti/keys/ti-degenerate-key.pem
rename to arch/arm/mach-k3/keys/ti-degenerate-key.pem