[IA64] Build new infrastructure for fast fault handling path.

[IA64] Build new infrastructure for fast fault handling path.

1. use jump table to dispatch virtualization faults.
2. for virtualization faults, handler is executed with psr.i=0, psr.ic=0,
   psr.bn=0. less context switch.
3. use register stack instead of memory stack to switch context.
4. Use C code to handle faults as possible, to reduce maintanance efforts,
	remove assembly handlers for rsm , ssm, mov to psr, mov to rr.
5. add fast path C handler for rsm, ssm, mov to psr, rfi.

Signed-off-by: Anthony Xu <anthony.xu@intel.com>