rnd device is now almost mandatory, as we use ssh/openssh heavily
	and openssh does not work without /dev/urandom.
	GENERIC kernel for the following platform do not have rnd device
	in the kernel config file:
		bebox mvme68k newsmips sparc64

	my question is:
	- are there any specific reason for them to disable it?
	- does it make sense to add rnd device to them?

itojun