tools/power/x86/intel-speed-select: Update version

Update tool and supported API version. This is the first version which
supports newer Xeon platforms with TPMI support.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
[srinivas.pandruvada@linux.intel.com: subject and changelog edits]
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>

tools/power/x86/intel-speed-select/isst-config.c

@@ -15,9 +15,9 @@ struct process_cmd_struct {
 	int arg;
 };
 
-static const char *version_str = "v1.14";
+static const char *version_str = "v1.15";
 
-static const int supported_api_ver = 1;
+static const int supported_api_ver = 2;
 static struct isst_if_platform_info isst_platform_info;
 static char *progname;
 static int debug_flag;