[PATCH] v850 kernel entry fixes and cleanup
1) Preserve the v850 system-call-number register when handling a signal; otherwise system calls will not be correctly restarted afterwards 2) Correctly handle illegal insn exceptions, which need a special instruction to return (not reti), and save PC/PSW to a different place 2) Remove some unnecessary register saving in the trap handler 3) Consolidate various places that use the register save/restore macros 4) Eliminate some unused compile-time configuration stuff 5) A bit of whitespace and other syntactic cleanup
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