[.editorconfig] Add rules to match Astyle rules

fpistm · fpistm · commit 30ca0e1ab7b1 · 2020-03-31T15:25:00.000+02:00
Signed-off-by: Frederic Pillon &lt;frederic.pillon@st.com&gt;
diff --git a/.editorconfig b/.editorconfig
@@ -1,6 +1,9 @@
 [*]
 end_of_line = lf
 insert_final_newline = true
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace =  true
 
 [*.sh]
 # like -i=2
