staging: axis-fifo: Fix indentation

Warning reported by checkpatch.pl script:

CHECK: Alignment should match open parenthesis
Signed-off-by: Uri Arev <me@wantyapps.xyz>
Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20240305211416.755911-1-me@wantyapps.xyzSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>