net: cnss: disable CNSS flag for CNSS SDIO

Disable kernel config flag CNSS for SDIO based interface
to avoid compilation in wlan host driver.

Change-Id: I318148f467c3b313d4a0c94cba651d56787846d9
Signed-off-by: Sarada Prasanna Garnayak <sgarna@codeaurora.org>