linux-imx: add clock patch for revision T0 1.0 of i.MX6Q

The post dividers do not work on i.MX6Q rev T0 1.0 so they must be fixed
to 1. As the table index was wrong, a divider a of 4 could still be
requested which implied the clock not to be set properly. This is the
root cause of the HDMI not working at high resolution on rev T0 1.0 of
the SoC, giving the following error:
mxc_sdc_fb fb.27: timeout when waiting for flip irq

Signed-off-by: Gary Bisson <bisson.gary@gmail.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
image_types_fsl.bbclass: Use 69K as offset to load image

The U-Boot mainline uses 69K as offset so we ought to use it here;
this aligns the SD card image layout to work out of box with all
U-Boot mainline based SPL boards.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>