msm: sdio: Remove sdio tty ciq device.

OEM's have requested to remove CIQ support from our sotfware,
hence remove sdio tty ciq device that exposes the SDIO_CIQ channel
to userspace. The channel configuration itself will be removed
from client on the modem side. Also remove the test code related
to SDIO_CIQ channel.

Change-Id: I47702dd024d9aa549b55b713b12732838fb665a8
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>