msm: 8960: remove gpio request from bluetooth platform init

Moved the gpio request and configuation to bluetooth power on
sequence as it is required only when bluetooth is turned on.

Change-Id: Iaef2f6a87087c45b586d80a41be42889d42a4fcf
Signed-off-by: Ram Mohan Korukonda <rkorukon@codeaurora.org>