unmerged BERI DTS files) to head:
Use the OFW compatible string "mips,mips4k" rather than
"mips4k,cp0" for interrupt control using MIPS4k CP0.
Suggested by: thompsa
Implement a MIPS FDT PIC decode routine to use when no PIC has been
configured, which assumes a cascade back to the nexus bus (e.g.,
the on-board CP0 interrupt management parts on the MIPS). If the
soc bus in a MIPS DTS file is declared as "mips4k,cp0"-compatible,
then this will be enabled. This is sufficient to allow IRQs to be
configured on BERI.
Sponsored by: DARPA, AFRL
