input: msg21xx_ts: Move the driver to proper path

This Mstar CTP reference driver code is added into a wrong place,
a follow-on patch is created to move the driver to proper path.

Change-Id: I34365ce21659348ad1d1289e3b06b81e778c2648
Signed-off-by: Mao Li <maol@codeaurora.org>
Signed-off-by: Sudhakar Manapati <smanap@codeaurora.org>