linux-g2c: bump SRCREV to pick up LCD panel power/signal sequencing changes

Eliminates white flash on LCD at power up

Signed-off-by: Steve Sakoman <steve@sakoman.com>
linux-g2c: bump SRCREV to pick up beeper support via leds-mxs-pwm driver

This commit also updates the defconfig to enable the leds-mxs-pwm driver

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