update doc generate tool (#1704)

Author: Chao1Han

docs/Doxyfile

@@ -791,7 +791,7 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = ../csrc/include
+INPUT                  = ../csrc/include/xpu
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses