defconfig: sa2150p: remove cnss driver from build

WLAN is not required for sa2145p and sa2150p based products.
This commit removes drivers which provides WCNSS/WLAN functionality.

Change-Id: I3ad70bc630c08845e45ba81d85b11081033f0101
Signed-off-by: Rishi Gupta <rishgupt@codeaurora.org>