acpi_gsi_get_irq_type could be use out of GSI purpose.

Rename and make it available as a resource function.
Acked-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NChristophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>