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These are needed when running GCC tests for newlib toolchains built with
multicore support. Without these SPRs we get the following warnings
when running tests.
spawn or1k-elf-run ./20000112-1.exe^M
WARNING: l.mfspr with invalid SPR address 0x80^M
WARNING: l.mfspr with invalid SPR address 0x81^M
WARNING: l.mfspr with invalid SPR address 0x81^M
WARNING: l.mfspr with invalid SPR address 0x81^M
Support is added by defining the SPRs in the cgen machine definition and
regenerating the machine code. In or1k/or1k.c we initialize NUMCORES to
1 and COREID to 0 as the sim has only one CPU. In or1k/traps.c we allow
returning the NUMCORES and COREID spr values in the mfspr function.
Signed-off-by: Stafford Horne <shorne@gmail.com>