fips: split loading the crypto modules and checking the kernel

fips: split loading the crypto modules and checking the kernel

In e54ab383 we moved the fips script to a later pahse of boot, since
the /boot might not be available early on.

The problem is that systemd-cryptsetup* services could be run now
started before the do_fips is executed and need the crypto modules
to decrypted the devices.

So let's split the do_fips and load the module before udev does the
trigger.