1-wire: add PDA TM7000 support

The PDA TM7000 is a 7-inch display panel with capacitive touch using
Atmel mxt1768E. It's solution is 800 x 480.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
1-wire: correc the map table end indicator

Signed-off-by: Bo Shen <voice.shen@atmel.com>