Stop using mx6s SoC family

The i.MX6 Solo is internally a i.MX6 Dual Lite but single core. This
uses the mx6dl as the SoC family as it is already being done in the
Kernel, U-Boot and Barebox.

Change-Id: If587097d9e3be35eadca27e67c11415a4fb0f1c1
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
linux-cfa: remove useless debug

This removes useless and very verbose debug that would appear e.g. while
plugging a USB stick.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
linux-cfa: bump revision

Bump the revision to include a workaround for the USB phy issue we are
sometimes seeing.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>