irqchip/renesas-irqc: Make use of irq_find_mapping()
irqchip/renesas-irqc: Make use of irq_find_mapping()

Instead of locally caching the virq as domain_irq simply rely on the
IRQ domain code and irq_find_mapping().  This reduces the delta
between the IRQC driver and the generic chip implementation.

Signed-off-by: Magnus Damm <a6a3bd36954036829852341c73dc05e35af516bf@opensource.se>
Cc: 68c46a606457643eab92053c1c05574abb26f861@lakedaemon.net
Cc: a1ff81395f7e6bf5b509fe9aab06bf3419493e1d@glider.be
Cc: a105fd58f578dea0be108941d4c59d15396e1855@verge.net.au
Cc: Magnus Damm <1f369b7bccd13b930ed9aa83ec10be6225fd866f@gmail.com>
Link: 1494ea47ef4a4c69f7d77c0fecf1b10861aad524@little-apple
Signed-off-by: Thomas Gleixner <00e4cf8f46a57000a44449bf9dd8cbbcc209fd2a@linutronix.de>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs