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>

bcmserver.c

@@ -2,7 +2,7 @@
 /*
  * tst-bcm-server.c
  *
- * Test programm that implements a socket server which understands ASCII
+ * Test program that implements a socket server which understands ASCII
  * messages for simple broadcast manager frame send commands.
  *
  * < interface command ival_s ival_us can_id can_dlc [data]* >