Fix boot with `fips` without a value

If you boot system with `fips` and not `fips=1` then you will get unary
operator expected error. This will fix this problem.

modules.d/01fips/fips-boot.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-if ! fipsmode=$(getarg fips) || [ $fipsmode = "0" ]; then
+if ! fipsmode=$(getarg fips) || [ "$fipsmode" = "0" ]; then
     rm -f -- /etc/modprobe.d/fips.conf >/dev/null 2>&1
 elif getarg boot= >/dev/null; then
     . /sbin/fips.sh

modules.d/01fips/fips-noboot.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-if ! fipsmode=$(getarg fips) || [ $fipsmode = "0" ]; then
+if ! fipsmode=$(getarg fips) || [ "$fipsmode" = "0" ]; then
     rm -f -- /etc/modprobe.d/fips.conf >/dev/null 2>&1
 elif ! [ -f /tmp/fipsdone ]; then
     . /sbin/fips.sh