Kernel 5.10 and up have renamed kzfree to kfree_secure. As such,
we have added a cam_free_clear function to redirect all uses of kzfree
uses to the appropriate function depending on the kernel version the
driver is built against.
CRs-Fixed: 2835738
Change-Id: I72d191c9fb0454a4dbb1392894a909e81fe07caa
Signed-off-by: Karthik Jayakumar <kjayakum@codeaurora.org>