Scripts: Testbench: Add xt-testbench build for MTL with xt-clang

Build for MTL needs other compiler xt-clang, so the COMPILER is
set by default to xt-xcc and changed for MTL in set_xtensa_params.sh
where also core and tools version is defined.

Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>

scripts/rebuild-testbench.sh

@@ -57,6 +57,7 @@ setup_xtensa_tools_build()
     BUILD_TYPE=xt
     BUILD_TARGET=
     BUILD_DIR_NAME=build_xt_testbench
+    COMPILER="xt-xcc"
 
     # check needed environment variables
     test -n "${XTENSA_TOOLS_ROOT}" || die "XTENSA_TOOLS_ROOT need to be set.\n"
@@ -72,11 +73,10 @@ setup_xtensa_tools_build()
     test -n "${XTENSA_CORE}" ||
         die "Illegal platform $BUILD_PLATFORM, no XTENSA_CORE found.\n"
 
-    compiler="xt-xcc"
     install_bin=install/tools/$XTENSA_TOOLS_VERSION/XtensaTools/bin
     tools_bin=$XTENSA_TOOLS_ROOT/$install_bin
     testbench_sections="-Wl,--sections-placement $BUILD_TESTBENCH_DIR/testbench_xcc_sections.txt"
-    export CC=$tools_bin/$compiler
+    export CC=$tools_bin/$COMPILER
     export LD=$tools_bin/xt-ld
     export OBJDUMP=$tools_bin/xt-objdump
     export LDFLAGS="-mlsp=sim $testbench_sections"

scripts/set_xtensa_params.sh

@@ -81,4 +81,10 @@ case "$platform" in
 	HOST="xtensa-mt8195-elf"
 	XTENSA_TOOLS_VERSION="RI-2019.1-linux"
 	;;
+    mtl)
+	PLATFORM="mtl"
+	XTENSA_CORE="ace10_LX7HiFi4_2022_10"
+	XTENSA_TOOLS_VERSION="RI-2022.10-linux"
+	COMPILER="xt-clang"
+	;;
 esac