linux-g2c: disable pca953x driver

temporary workaround till driver crashing bug is fixed

Signed-off-by: Steve Sakoman <steve@sakoman.com>
linux-g2c: bump SRCREV to pick up latest kernel fixes

changes include conditional setup of sitronix and pca953x drivers
as well as a fix for a crashing bug in the mxs-ts driver

Signed-off-by: Steve Sakoman <steve@sakoman.com>
config: g2c1: don't start virtual terminal on the LCD framebuffer

Signed-off-by: Steve Sakoman <steve@sakoman.com>