msm: wlan: Update US wifi database for TDWR channels

Update the US regulatory database for TDWR channels.
Also update the tx power of US DFS channels.

CRs-Fixed: 725496
Change-Id: Iceb30a61579dad0ea9325853b5aabc9ab23caa62
Signed-off-by: Amar Singhal <asinghal@codeaurora.org>