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This function provides bitwise clear/set operations on 32-bit words
via FEL. It may help with implementing future functionality, where
ARM register manipulations often involve such bit level access.
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>

These might be useful in case the code requires maintenance/changes.
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>

"make headers" (which in turn invokes "make -C thunks/" should now
build the include files via awk, avoiding the need for ruby.
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>