EXPERIMENTAL: do not enforce uart1 console in kernel, leave it to command line

It is noted that this does not work now and console is still enforced. To be investigated later
OHCI-da8xx API changed to follow latest davinci fixes
Added null callback checks to OHCI-da8xx driver
Removed OHCI-da8xx callbacks for TRIK board since USB 1.1 has no power control and is always on
Reworked USB initialization