msm: sps: provide an option not to disable a pipe during disconnection

IPA HW will treat a producer pipe as a consumer pipe when that pipe is
disable. Thus, provide an option for IPA driver not to disable the
producer pipes when disconnect these pipes.

Change-Id: I8ec53b63a2d2f2908153bb3a4d935fbb70f72a48
Signed-off-by: Yan He <yanhe@codeaurora.org>