Merging r270208:

------------------------------------------------------------------------
r270208 | slthakur | 2016-05-20 17:41:52 +0530 (Fri, 20 May 2016) | 10 lines

[LLDB][MIPS] Fix Floating point Registers Encoding

Patch by Nitesh Jain.

Summary: Currently floating point regsiters has eEncodingUint encoding. Hence register write  '1.25' will failed. This patch add eEncodingIEEE754 encoding for floating point registers( - ). This patch will fix test_fp_register_write in TestRegisters.py

Reviewers: clayborg, sagar
Subscribers: mohit.bhakkad, jaydeep, bhushan, sdardis, lldb-commits
Differential: D18853

------------------------------------------------------------------------

llvm-svn: 271383