board: 8064: set correct ts_sleep gpio based on target

Alternate configuration remaps touchscreen sleep gpio from 33
to 12. Also, move the touchscreen gpio config outisde the
macro.

Change-Id: I7dab0b886eda75a12b76da90f4d8b9c6e2a6e0a4
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>