Added Max 8903B charger header file needed for A6 support.

Signed-off-by: Samarth Parikh <samarthp@ymail.com>
Added High Resolution counter files needed for A6 support.

Signed-off-by: Samarth Parikh <samarthp@ymail.com>
Added A6 Support for HP Touchpad.

Signed-off-by: Samarth Parikh <samarthp@ymail.com>