[PATCH] [ARM64] Correct more bounds checks/diagnostics for arithmetic shift operands

[Bradley Smith]

Hi t.p.northover,

Patch to correct more bounds checks/diagnostics for arithmetic shift operands, this also make various invalid shifts actually invalid hence some test updates were needed.

As with my previous patches, there is no testcase for this as it is part of the merge of MC/AArch64/basic-a64-diagnostics.s.

http://reviews.llvm.org/D3700

Files:
  lib/Target/ARM64/ARM64InstrFormats.td
  lib/Target/ARM64/AsmParser/ARM64AsmParser.cpp
  test/MC/ARM64/arithmetic-encoding.s
  test/MC/ARM64/diags.s
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