qcacmn: Add wbuff include path for spectral compilation

wbuff is a module which maintains a pre-allocated pool of
skbs for each registered module and allocates skbs when
requested. Add wbuff/inc in include path for qca_spectral
compilation.

Change-Id: I6bc9eaca99f7789eaa5cb0500d0258495caf7ea4
CRs-Fixed: 2313935
1 file changed