patman: Change the location of patman config file

Move the config file from ~/.config/patman to ~/.patman as it is
more appropriate to have it there. Update the same in the README.

Signed-off-by: Vikram Narayanan <vikram186@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/patman/README b/tools/patman/README
index 7ba9e80..1af8665 100644
--- a/tools/patman/README
+++ b/tools/patman/README
@@ -68,7 +68,7 @@
 For most cases patman will locate and use the file 'doc/git-mailrc' in
 your U-Boot directory. This contains most of the aliases you will need.
 
-To add your own, create a file ~/.config/patman directory like this:
+To add your own, create a file ~/.patman like this:
 
 >>>>
 # patman alias file