genirq: Move irq_wait_for_poll() to call site

Move it to the call site so that the waiting for the INPROGRESS flag can be
reused by an upcoming mitigation for a potential live lock in the edge type
handler.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Liangyan <liangyan.peng@bytedance.com>
Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Link: https://lore.kernel.org/all/20250718185311.948555026@linutronix.de