Update PS kernel return code location to end of arguments

[jeffli-xilinx]

Problem solved by the commit

Move PS kernel return code after arguments in the command buffer

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

Prevents overwrite of PS kernel command buffer

How problem was solved, alternative solutions (if any) and why they were rejected

Calculate offset for return code at end of argument list

Risks (if any) associated the changes in the commit

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

PS kernel validate tests

Documentation impact (if any)

[gbuildx]

Build Passed!

[gbuildx]

Build Passed!

[chvamshi-xilinx]

Hi @jeffli-xilinx , Can you please resolve the conflicts.

[gbuildx]

Build Failed! :(

[salindac]

retest this please

[gbuildx]

Build Passed!