staging: vt6655: Remove macro PCAvDelayByIO

Remove do-while(0) and CamelCase macro PCAvDelayByIO as
it is not accepted by checkpatch.pl
As the macro is just used once with a constant <= 50 the
functionality of the macro is implemented by using
udelay() directly.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/e8267e7566d389f318a72d911083e52b02e37210.1649706687.git.philipp.g.hortmann@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>