UBUNTU: SAUCE: UEFI: Add option to automatically enforce module signatures when in...

UBUNTU: SAUCE: UEFI: Add option to automatically enforce module signatures when in Secure Boot mode

UEFI Secure Boot provides a mechanism for ensuring that the firmware will
only load signed bootloaders and kernels. Certain use cases may also
require that all kernel modules also be signed. Add a configuration option
that enforces this automatically when enabled.

Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Conflicts:
	arch/x86/boot/compressed/eboot.c