flash_header: update support for lpddr2 part

* Update support for lpddre micron part
  MT42L256M32D2-L25

Signed-off-by: Adrian Alonso <aalonso@htdevices.com>
mx6q_jupiter: include config cleanup

* Include config clean up remove unused macros

Signed-off-by: Adrian Alonso <aalonso@htdevices.com>