HSD #22012990567: crypto: intel_fcs: use the word rather than bit

commit  30e88b48281fb1a1b43a0b9b1a8e4542908028a3 from
https://github.com/altera-opensource/linux-socfpga.git



Using the word rather than bit for certificate to address a comment from
community on upstreamed patch.

Signed-off-by: Richard Gong <richard.gong@intel.com>
Signed-off-by: Meng Li <Meng.Li@windriver.com>