hw/intc/arm_gicv3_its: Don't allow intid 1023 in MAPI/MAPTI

hw/intc/arm_gicv3_its: Don't allow intid 1023 in MAPI/MAPTI

When handling MAPI/MAPTI, we allow the supplied interrupt ID to be
either 1023 or something in the valid LPI range.  This is a mistake:
only a real valid LPI is allowed.  (The general behaviour of the ITS
is that most interrupt ID fields require a value in the LPI range;
the exception is that fields specifying a doorbell value, which are
all in GICv4 commands, allow also 1023 to mean "no doorbell".)
Remove the condition that incorrectly allows 1023 here.

Signed-off-by: Peter Maydell <[email protected]>
Reviewed-by: Richard Henderson <[email protected]>
Message-id: 20220201193207.2771604[email protected]