Leaving this code enabled breaks the build on some architectures,
and we shouldn't have any floating point math in the kernel, anyway.

These macros need to be re-written, but it's harmless to simply
return zero for now.
Signed-off-by: Michael Krufky <mkrufky@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>