[qca-nss-drv] minor change added function decleration

extern nss_cmn_get_nss_enabled() api in header file
to avoid implicit decleration warnings in qca-wifi

Change-Id: Ic8aa28878c47b0606390fd2c40ebb9ebc2c6cff8
Signed-off-by: Chaithanya Garrepalli <cgarre@codeaurora.org>
1 file changed