Fix spelling in various files

codespell parameters:

codespell -q 3 --skip="*.in,*.sh,*.m4,config,configure,autom4te.cache"

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>

lib.h

@@ -97,7 +97,7 @@ int hexstring2data(char *arg, unsigned char *data, int maxdlen);
 
 int parse_canframe(char *cs, struct canfd_frame *cf);
 /*
- * Transfers a valid ASCII string decribing a CAN frame into struct canfd_frame.
+ * Transfers a valid ASCII string describing a CAN frame into struct canfd_frame.
  *
  * CAN 2.0 frames
  * - string layout <can_id>#{R{len}|data}