tty_port: Remove incorrect whitespace after comments

Currently there are a bunch of kernel-doc function comments that have a
line of whitespace after the comment and before the function they
comment - this is incorrect, there should be no whitespace here.

Remove incorrect whitespace between comment and associated function.

Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>