added editorconfig and formated code

.editorconfig

@@ -0,0 +1,40 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = space
+indent_size = 4
+tab_width = 8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[DEVELOPERS]
+indent_style = tab
+indent_size = tab
+
+[Config*.in*]
+indent_style = tab
+indent_size = tab
+
+[linux/Config.ext.in]
+indent_style = tab
+indent_size = tab
+
+[Makefile*]
+indent_style = tab
+indent_size = tab
+
+[*.mk]
+indent_style = tab
+indent_size = tab
+
+[*.patch]
+trim_trailing_whitespace = false
+
+[S{0..9}{0..9}*]
+indent_style = tab
+indent_size = tab
+
+[*.adoc]
+trim_trailing_whitespace = false