Rename _SpuriousIRQ to _irq_spurious

Renaming camelCase _SpuriousIRQ makes code more readable and
consistent.

Change-Id: I2bda4d107091384811d9f9187f3529960842631e
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
6 files changed