Fix incorrect editorconfig

Fixed the indent_size to 3, as defined in the libretro coding standard.
Set Makefiles to use 3 space indentation as done in RetroArch Makefiles.
Removed self-explanatory comments.

Signed-off-by: Mahyar Koshkouei <mk@deltabeard.com>

.editorconfig

@@ -1,21 +1,20 @@
-# EditorConfig is awesome: http://EditorConfig.org
+# Libretro coding standards
+# See https://libretro.readthedocs.io/en/latest/development/coding-standards/
+# Or search for "Libretro Coding Standards"
 
-# top-most EditorConfig file
 root = true
 
-# Unix-style newlines with a newline ending every file
 [*]
 end_of_line = lf
 insert_final_newline = true
+trim_trailing_whitespace = true
 charset = utf-8
 
-# Tab indentation (no size specified)
 [Makefile]
-indent_style = tab
+indent_style = space
+indent_size = 3
 
-# Matches multiple files with brace expansion notation
-# Set default charset
 [*.{c,h}]
 indent_style = space
-indent_size = 2
-trim_trailing_whitespace = true
+indent_size = 3
+max_line_length = 80