configs/atmel_sama5d3xek: bump to linux4sam_5.8

Bump sama5d3xek to linux4sam_5.8. The 3 foundation components have their tags
changed (AT91Bootstrap, U-Boot, Linux kernel).  This requires bumping the kernel
header version and u-boot dtc as well.

at91bootstrap 3.8.10 is required to support gcc7.

Signed-off-by: Joshua Henderson <joshua.henderson@microchip.com>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
1 file changed