Caution if 3.5 gets brought to F17

[Bruno Wolff III]

Under the 3.5 kernel I need to have the hid_generic module loaded for my 
USB keyboards to work. I didn't with the 3.4 kernels. This caused a problem 
with being able to be able to enter the password for my encrypted rootfs.

dracut master now has hid_generic in the list of modules it needs to include. 
This change will be in the next dracut release for rawhide. However, if 3.5 
kernels do get used for F17, it would be good to get the change backported 
to dracut used in F17 before the new kernel shows up.