HE: Disable 2 GHz VHT support in HE testbed defaults

HE testbed device default configuration disables the VHT support in the
2.4 GHz band. Hence add support to configure VHT support in the 2.4 GHz
band and disable the VHT support in 2.4 GHz for HE testbed.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
1 file changed