staging: ft1000: Remove unnecessary check in write_blk_fifo().

byte_length = word_length * 4;

if (byte_length % 4) ...

word_length * 4 is always aligned at 4 bytes. Remove pointless
check.

Signed-off-by: Marek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>