create-vm: Use other file for kvm_intel params

mkcloud uses /etc/modprobe.d/80-kvm-intel.conf for kvm_intel module
options. Use the same file for create-vm.sh so we don't use two
different places for the module options.
Merge pull request #65 from toabctl/kvm-intel-options-path

create-vm: Use other file for kvm_intel params