Doc: add some kernel related end of life information

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.0: keep in sync with stable release 3.0.67

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.4: keep in sync with stable release 3.4.34

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.7: keep in sync with stable release 3.7.10

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.8: keep in sync with stable release 3.8.1

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
BSP: use ptxdist-2013.03.0

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.0: keep in sync with stable release 3.0.68

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.2: keep in sync with stable release 3.2.40

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.4: keep in sync with stable release 3.4.35

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.8: keep in sync with stable release 3.8.2

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.0: keep in sync with stable release 3.0.69

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.4: keep in sync with stable release 3.4.36

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.8: keep in sync with stable release 3.8.3

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.7: mark it as end-of-life

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.0: keep in sync with stable release 3.0.70

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.2: keep in sync with stable release 3.2.41

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.4: keep in sync with stable release 3.4.37

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.8: keep in sync with stable release 3.8.4

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.0: keep in sync with stable release 3.0.71

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Kernel-3.2: keep in sync with stable release 3.2.42

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>