Support disabling kernel module signature verification.
Note that this does not work when SecureBoot is enabled.
Fixes: #11989
Signed-off-by: Noel Georgi <git@frezbo.dev>
Make default args depend on quirks, and also pass quirks down to
platform code.
Reduces amount of hacks, but it is functionally equivalent.
Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>