Add QCA vendor attribute to configure list of allowed frequencies for AP

Add QCA vendor attribute to configure list of allowed frequencies for AP

Define a new attribute QCA_WLAN_VENDOR_ATTR_CONFIG_AP_ALLOWED_FREQ_LIST
to configure the full list of allowed frequencies for the AP operation.
The configuration is valid only from the next BSS start until the BSS is
stopped. The drivers shall filter out channels on top of this list of
channels based on regulatory or other constraints. This can be used to
specify user's choice of frequencies, allowed list of channels with
static puncturing feature, etc.

Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>