msm: tspp: Fix memory leak

SPS end point was not released when tspp
output pipe was closed.

Signed-off-by: Hamad Kadmany <hkadmany@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>