sh-pfc: sh73a0: Sort IRQ entries by IRQ number

This makes catching duplicate entries easier. Merge the two IRQ9 entries
found after sorting.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>