Allow specifying rsmi-lib install path

Instead of hard-coding install path to /opt/rocm, allow users to specify
where "make install" goes to so users can install lib to their local build
path for testing purpose without touching global /opt/rocm files.

Signed-off-by: Amber Lin <Amber.Lin@amd.com>
Change-Id: I4144988e325edae4d1d1a2824e031996091036d3


[ROCm/amdsmi commit: 741f9c31ff]

projects/amdsmi/CMakeLists.txt

@@ -56,8 +56,10 @@ message("SOVERSION: ${SO_VERSION_STRING}")
 ##  rocm_smi_lib-dev
 set(SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}
                               CACHE STRING "Location of rocm_smi source code.")
-set(CMAKE_INSTALL_PREFIX "/opt/rocm"
-                                CACHE STRING "Default installation directory.")
+if(NOT DEFINED CMAKE_INSTALL_PREFIX)
+    set(CMAKE_INSTALL_PREFIX "/opt/rocm"
+                              CACHE STRING "Default installation directory.")
+endif ()
 set(CPACK_PACKAGING_INSTALL_PREFIX "/opt/rocm"
                                       CACHE STRING "Default packaging prefix.")
 set(CPACK_GENERATOR "DEB;RPM"  CACHE STRING "Default packaging generators.")