intel: automake: replace direct basename $@ invokation with $(@F)

Use the shorthand make variable(s) as elsewhere in the build.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

src/intel/Makefile.genxml.am

@@ -37,7 +37,7 @@ $(GENXML_GENERATED_FILES): genxml/gen_pack_header.py
 %_xml.h:  %.xml Makefile
 	$(MKDIR_GEN)
 	$(AM_V_GEN) echo -n "static const uint8_t " > $@; \
-	echo "`basename $@`_xml[] = {" | sed -e 's,_xml.h,,' >> $@; \
+	echo "$(@F)_xml[] = {" | sed -e 's,_xml.h,,' >> $@; \
 	cat $< | $(XXD) -i >> $@; \
 	echo "};" >> $@