If there is only 1 function interrupt registered it is possible to
improve performance by directly calling the irq handler and avoiding
the overhead of reading the CCCR registers.
Signed-off-by: NPer Forlin <per.forlin@linaro.org>
Acked-by: NUlf Hansson <ulf.hansson@stericsson.com>
Reviewed-by: NNicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>