Revert "u_hsuart: Fix a bug in opening the SMUX port"

This reverts commit 2deee01e6e23d8288f86d96c0a005afd701d777c.
msm: kgsl: reconcile with apq8064

Change-Id: Ifeb6196ecfbafcab38d97b621c3ed2d0ae091d3a