staging: wfx: remove useless extra jiffy

The initial developer has feared msecs_to_jiffies() could round down the
result. However, the documentation of msecs_to_jiffies() says that the
result is rounded upward. So the increment of the result of
msecs_to_jiffies() is not necessary.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200825085828.399505-11-Jerome.Pouiller@silabs.com


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