drivers/interrupt_controller: No VT-D if no PCIE MSI multi-vector

There is no point to enable VT-D if PCIE MSI multi-vector support is not
requested, as VT-D is uniquely being used to remap MSI multi-vector
based interrupts.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>