UIM (User Identity Module) driver makes use of existing MSM serial driver. It configures UIM clock during startup and shutdown of UART device. Change-Id: If1b249639e9969273882ad000ef9b1495b8c7013 Acked-by: Ho Lee <holee@qualcomm.com> Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>