Remove hard-coded kernel version from RCN release

Signed-off-by: Charles Steinkuehler <charles@steinkuehler.net>
uEnv.txt : Enable eMMC and BeBoPr overlays

Signed-off-by: Charles Steinkuehler <charles@steinkuehler.net>
Machinekit : Remove documenatation build-dependencies
Saves over 1G of space on the target rootfs!

Signed-off-by: Charles Steinkuehler <charles@steinkuehler.net>
Machinekit : Bump to kernel -bone53

Signed-off-by: Charles Steinkuehler <charles@steinkuehler.net>
Machinekit : Disable unneeded compress step
This generates the tar file of the entire image directory in deploy/
Required if shipping *.tar.xz images for using setup_sdcard.sh, but
not needed if only shipping full image files.

Signed-off-by: Charles Steinkuehler <charles@steinkuehler.net>
Initial version of init-eMMC-flasher.sh support

Signed-off-by: Charles Steinkuehler <charles@steinkuehler.net>