ti-rtos-firmware: sign DM firmware for J721e HS platform

U-boot build process requires DM firmware to be signed for J7 HS.
It's better for ti-rtos-firmware package (that delivers DM firmware) to sign
it once and provide signed version to other packages, instead of U-boot needing
to re-sign it during build in staging location.

Signed-off-by: Praneeth Bajjuri <praneeth@ti.com>
Signed-off-by: Denys Dmytriyenko <denys@konsulko.com>

recipes-ti/ti-rtos-bin/ti-rtos-firmware.bb

@@ -76,6 +76,18 @@ DEPENDS += "openssl-native"
 
 FILES_${PN} += "${base_libdir}"
 
+TI_SECURE_DEV_PKG ?= ""
+
+DM_FIRMWARE = "ipc_echo_testb_mcu1_0_release_strip.xer5f"
+
+do_install_prepend_j7-hs-evm() {
+	export TI_SECURE_DEV_PKG=${TI_SECURE_DEV_PKG}
+	( cd ${S}/firmware/pdk-ipc/; \
+		mv ${DM_FIRMWARE} ${DM_FIRMWARE}.unsigned; \
+		${TI_SECURE_DEV_PKG}/scripts/secure-binary-image.sh ${DM_FIRMWARE}.unsigned ${DM_FIRMWARE}; \
+	)
+}
+
 do_install() {
 	CP_ARGS="-Prf --preserve=mode,timestamps --no-preserve=ownership"
 	install -d ${D}${base_libdir}