Rename irq_data_get_msi() as irq_data_get_msi_desc() to keep consistency
with other irq_data access helpers.
Signed-off-by: NJiang Liu <jiang.liu@linux.intel.com>
Acked-by: NBjorn Helgaas <bhelgaas@google.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>