1) Validation fails for literal indexes too large for accessing a given
heap type

2) Removes the special handling of FloatishDoubleQ, and FloatQDoubleQ;
the inheritance issue that required this special handling was fixed in
another CL.

3) Fix a macro name (from asm_* to ASM_*)

BUG= https://bugs.chromium.org/p/v8/issues/detail?id=4203
TEST=cctest/asmjs/test-asm-typer.cc
LOG=N

Review-Url: https://codereview.chromium.org/2150583003
Cr-Commit-Position: refs/heads/master@{#37776}