Merging r216064:

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r216064 | kongyi | 2014-08-20 03:40:20 -0700 (Wed, 20 Aug 2014) | 9 lines

ARM: Fix codegen for rbit intrinsic

LLVM generates illegal `rbit r0, #352` instruction for rbit intrinsic.
According to ARM ARM, rbit only takes register as argument, not immediate.
The correct instruction should be rbit <Rd>, <Rm>.

The bug was originally introduced in r211057.

Differential Revision: http://reviews.llvm.org/D4980
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_35@216089 91177308-0d34-0410-b5e6-96231b3b80d8