MLK-19517-15 brcmfmac: reduce timeout for action frame scan

MLK-19517-15 brcmfmac: reduce timeout for action frame scan

Finding a common channel to send an action frame out is required for
some action types. Since a loop with several scan retry is used to find
the channel, a short wait time could be considered for each attempt.
This patch reduces the wait time from 1500 to 450 msec for each action
frame scan.

Signed-off-by: Chung-Hsien Hsu <stanley.hsu@cypress.com>
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
(cherry picked from commit:4435f37332bd39026028a81b6e442bbe3105e790)
Signed-off-by: Vipul Kumar <vipul_kumar@mentor.com>