arm64: isr_wrapper: ignore Special INTIDs between 1020..1023

Referring the Arm Generic Interrupt Controller Architecture
Specification GIC architecture version 3 and version 4 document
(see 2.2.1 Special INTIDs paragraph), these INTIDs are reserved
for special purposes and should be ignored for now.

For the ITS implementation, the INTID 1023 must be ignored since this
special INTID will trigger after an LPI acknowledge, thus triggering
the spurious interrupt handler.

The GICv3 Linux implementation ignores these INTIDs the same way.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>