firmware: move EXPORT_SYMBOL annotations

Move EXPORT_SYMBOL annotations so they follow immediately after the
closing function brace line.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>