Link the external IRQ controllers irqc0 and irqc1 to the IRQC module
clock, so they can be power managed using that clock.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
[horms: corrected typo in changelog to refer to r8a73a4]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>