K 10
svn:author
V 6
mhorne
K 8
svn:date
V 27
2019-11-11T01:35:50.596045Z
K 7
svn:log
V 196
plic: fix PLIC_MAX_IRQS

The maximum number of PLIC interrupts is defined in the PLIC spec[1]
as 1024.

[1] https://github.com/riscv/riscv-plic-spec/blob/master/riscv-plic.adoc

MFC after:	1 week

END