audio_coding/neteq: Replaced macro WEBRTC_SPL_RSHIFT_W32 with >>
audio_coding/neteq: Replaced macro WEBRTC_SPL_RSHIFT_W32 with >>

BUG=3348,3353
TESTED=locally on linux and trybots
R=henrik.lundin@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/24009004

git-svn-id: 03ae4fbe531b1eefc9d815f31e49022782c42458@7473 4adac7df-926f-26a2-2b94-8c16560cd09d

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