code cleanup - update the setup script (#3)

* code cleanup - update the setup script

* fix few typo erros

samples/jpegDecode/CMakeLists.txt

@@ -68,6 +68,6 @@ else()
         message(FATAL_ERROR "-- ERROR!: HIP Not Found! - please install ROCm and HIP!")
     endif()
     if (NOT ROCJPEG_FOUND)
-        message(FATAL_ERROR "-- ERROR!: rocDecode Not Found! - please install rocDecode!")
+        message(FATAL_ERROR "-- ERROR!: rocJPEG Not Found! - please install rocJPEG!")
     endif()
 endif()