diag: Check for build time masks being greater than ssid range

Added a check for build time masks to be lesser than the ssid
range. We would ignore and print a warning otherwise.

Change-Id: Idf75658cc51d66834fa3c0d9f7a8a954be789efa
Signed-off-by: Ravi Aravamudhan <aravamud@codeaurora.org>