Actually fix version string

There seems to be a scope issue with the existing variables, but just
putting in the pkg version string seems sufficient.

Change-Id: I4ccef872ff848a70cb2abc07bf605c5f29a608e8
Signed-off-by: Jeremy Newton <Jeremy.Newton@amd.com>

CMakeLists.txt

@@ -232,7 +232,7 @@ configure_package_config_file(
 
 write_basic_package_version_file(
     ${CMAKE_CURRENT_BINARY_DIR}/rocm_smi-config-version.cmake
-    VERSION "${${AMD_SMI_LIBS_TARGET}_VERSION_MAJOR}.${${AMD_SMI_LIBS_TARGET}_VERSION_MINOR}.${${AMD_SMI_LIBS_TARGET}_VERSION_PATCH}"
+    VERSION "${PKG_VERSION_STR}"
     COMPATIBILITY SameMajorVersion
     )