CID-243254 & CID-194502 & CID-250105

[mamin506]

Problem solved by the commit

Fix some coverity issues, about dead code, uninitialized varaible and size check for kzalloc().

Bug / issue (if any) fixed, which PR introduced the bug, how it was discovered

Some of those code has been there for years. So, doesn't try to find out which PR introduce the issue.

Risks (if any) associated the changes in the commit

Low

What has been tested and how, request additional testing if necessary

Just try compile xocl/xclmgmt.

Documentation impact (if any)

No

[gbuildx]

Build Passed!