cnss: Add Support to load driver based on target attached

In Next Generation platforms; we support driver load at the bootup
based on the target attached.
Platform Driver(PD) exports the target revision read in pcie probe
to userspace through sys interface wlan_setup.

cnss-daemon in user space loads the driver based on the target revision
read from the sys file.

This change creates the sys interface to export the target parameters.

CRs-Fixed: 732694
Change-Id: Ia364f9c5df6116b9ca6ed28f545c3f0dd244386b
Signed-off-by: Komal Kumar <kseelam@codeaurora.org>