Many boot image configuration files refer to the
appropriate documentation file, but these references
contain typos in the directory and file name. Fix
them. Also fix reference to doc/README.SPL file.
Signed-off-by: Anatolij Gustschin <email@example.com>
Cc: Prafulla Wadaskar <firstname.lastname@example.org>
Cc: Stefano Babic <email@example.com>
Acked-by: Stefano Babic <firstname.lastname@example.org>