As IRQ0 should not be used (especially in when using irq domains), shift all
virtual IRQ numbers by one.
Signed-off-by: NDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Tested-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>