arch/x86: All dynamic IRQ connection need to be remapped

Allocate an IRTE for all irq being connected through
arch_irq_connect_dynamic(). This will be mandatory since VT-D expects to
filter all interruptions (but the one it generates, as we will see
later).

Taking into account CONFIG_INTEL_VTD_ICTL_XAPIC_PASSTHROUGH, which could
help for debugging.

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