[LangRef] Correct value ranges for address space, vector, and float bit sizes.

[LangRef] Correct value ranges for address space, vector, and float bit sizes.

- The current implementation checks them for 24-bit inegers but the
  document says 23-bit one effectively by listing the range as [1,2^23).
- Minor error message correction.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D144685