tools/power/x86/intel-speed-select: Implement CascadeLake-N help and command functions structures

CascadeLake-N only supports SST-BF and needs some of the perf-profile
commands, and the base-freq commands.

Add help functions, and create an empty command structures (the functions
will be implemented later in this patchset).  Call these functions
when running on CascadeLake-N.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

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

@@ -1610,6 +1610,10 @@ static void get_clos_assoc(int arg)
 	isst_ctdp_display_information_end(outf);
 }
 
+static struct process_cmd_struct clx_n_cmds[] = {
+	{ NULL, NULL, NULL, 0 }
+};
+
 static struct process_cmd_struct isst_cmds[] = {
 	{ "perf-profile", "get-lock-status", get_tdp_locked, 0 },
 	{ "perf-profile", "get-config-levels", get_tdp_levels, 0 },
@@ -1798,12 +1802,15 @@ static void isst_help(void)
 		TDP, etc.\n");
 	printf("\nCommands : For feature=perf-profile\n");
 	printf("\tinfo\n");
+
+	if (!is_clx_n_platform()) {
 		printf("\tget-lock-status\n");
 		printf("\tget-config-levels\n");
 		printf("\tget-config-version\n");
 		printf("\tget-config-enabled\n");
 		printf("\tget-config-current-level\n");
 		printf("\tset-config-level\n");
+	}
 }
 
 static void pbf_help(void)
@@ -1853,6 +1860,12 @@ static struct process_cmd_help_struct isst_help_cmds[] = {
 	{ NULL, NULL }
 };
 
+static struct process_cmd_help_struct clx_n_help_cmds[] = {
+	{ "perf-profile", isst_help },
+	{ "base-freq", pbf_help },
+	{ NULL, NULL }
+};
+
 void process_command(int argc, char **argv,
 		     struct process_cmd_help_struct *help_cmds,
 		     struct process_cmd_struct *cmds)
@@ -2001,11 +2014,15 @@ static void cmdline(int argc, char **argv)
 	set_max_cpu_num();
 	set_cpu_present_cpu_mask();
 	set_cpu_target_cpu_mask();
+
+	if (!is_clx_n_platform()) {
 		ret = isst_fill_platform_info();
 		if (ret)
 			goto out;
-
 		process_command(argc, argv, isst_help_cmds, isst_cmds);
+	} else {
+		process_command(argc, argv, clx_n_help_cmds, clx_n_cmds);
+	}
 out:
 	free_cpu_set(present_cpumask);
 	free_cpu_set(target_cpumask);