[+] Kernel: Add support for usb sound cards.

Signed-off-by: Anton Sergeev <Anton.Sergeev@elecard.ru>
[*] Rootfs: Add em28xx driver load at boot time on stb850.

Signed-off-by: Anton Sergeev <Anton.Sergeev@elecard.ru>
[*] Kernel: Switch off 'no wayout' feature in watchdog.

Signed-off-by: Anton Sergeev <Anton.Sergeev@elecard.ru>