Minor fixups to compile with TF-M #2403
                
     Merged
            
            
          
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TF-M (Arm Trusted Firmware M) requires c99 compatibility, which throws errors at these lines. There is currently a patch for 2.0.0 in TF-M which fixes these errors, which TF-M applies when cloning the SDK. I have updated it to work with 2.1.0, 2.1.1, and the
developbranch here, but it would be nice to get these fixups into the SDK so TF-M doesn't require this patch anymore.