Revert "cli_readline: Only insert printable chars"

This reverts commit d2e64d29c44dee6d455f7705dd1cf1af8674ad9a.

This commit broke support for pound sign (£) and euro sign (€) keys on
Nokia N900 keypad.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/common/cli_readline.c b/common/cli_readline.c
index f6e2bcd..d6444f5 100644
--- a/common/cli_readline.c
+++ b/common/cli_readline.c
@@ -517,10 +517,8 @@
 		}
 #endif
 		default:
-			if (ichar >= ' ' && ichar <= '~') {
-				cread_add_char(ichar, insert, &num, &eol_num,
-					       buf, *len);
-			}
+			cread_add_char(ichar, insert, &num, &eol_num, buf,
+				       *len);
 			break;
 		}
 	}