staging: fwserial: match alignment with open parenthesis

This patch fixes the following checkpatch.pl check:

CHECK: Alignment should match open parenthesis

in file fwserial.c
Signed-off-by: Nikolay Kyx <knv418@gmail.com>
Link: https://lore.kernel.org/r/20210219154917.23388-1-knv418@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>