Set a max of 1 consecutive blank line

Signed-off-by: Eduardo Ponz <[email protected]>

uncrustify.cfg

@@ -1981,7 +1981,7 @@ nl_split_while_one_liner        = false    # true/false
 #
 
 # The maximum number of consecutive newlines (3 = 2 blank lines).
-nl_max                          = 0        # unsigned number
+nl_max                          = 2        # unsigned number
 
 # The maximum number of consecutive newlines in a function.
 nl_max_blank_in_func            = 0        # unsigned number