Fix for stm33KTPM support pr deadcode

[aidangarske]

Fixed deadcode here

** CID 899688:       Control flow issues  (DEADCODE)
/tests/unit_tests.c: 318           in test_wolfTPM2_ST33_FirmwareUpgrade()


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*** CID 899688:         Control flow issues  (DEADCODE)
/tests/unit_tests.c: 318             in test_wolfTPM2_ST33_FirmwareUpgrade()
312     #endif /* !WOLFTPM2_NO_WOLFCRYPT */
313     
314         rc = 0;
315     
316         wolfTPM2_Cleanup(&dev);
317     
>>>     CID 899688:         Control flow issues  (DEADCODE)
>>>     Execution cannot reach the expression ""Failed"" inside this statement: "printf("Test ST33 Firmware ...".
318         printf("Test ST33 Firmware Upgrade:\tAPI Availability:\t%s\n",
319             rc == 0 ? "Passed" : "Failed");
320     }
321     #endif /* WOLFTPM_ST33 || WOLFTPM_AUTODETECT */
322     #endif /* WOLFTPM_FIRMWARE_UPGRADE */