cpufreq: amd-pstate-ut: Remove module parameter access

In amd-pstate-ut, shared memory-based systems call
get_shared_mem() as part of amd_pstate_ut_check_enabled()
function. This function was written when CONFIG_X86_AMD_PSTATE
was tristate config and amd_pstate can be built as a module.

Currently CONFIG_X86_AMD_PSTATE is a boolean config and module
parameter shared_mem is removed. But amd-pstate-ut code still
accesses this module parameter. Remove those accesses.

Fixes: 456ca88 ("cpufreq: amd-pstate: change amd-pstate driver to be built-in type")
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Meng Li <li.meng@amd.com>
Reviewed-by: Wyes Karny <wyes.karny@amd.com>
Suggested-by: Wyes Karny <wyes.karny@amd.com>
Signed-off-by: Swapnil Sapkal <swapnil.sapkal@amd.com>
[ rjw: Subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/amd-pstate-ut.c

@@ -64,27 +64,9 @@ static struct amd_pstate_ut_struct amd_pstate_ut_cases[] = {
 static bool get_shared_mem(void)
 {
  bool result = false;
- char path[] = "/sys/module/amd_pstate/parameters/shared_mem";
- char buf[5] = {0};
- struct file *filp = NULL;
- loff_t pos = 0;
- ssize_t ret;
-
- if (!boot_cpu_has(X86_FEATURE_CPPC)) {
- filp = filp_open(path, O_RDONLY, 0);
- if (IS_ERR(filp))
- pr_err("%s unable to open %s file!\n", __func__, path);
- else {
- ret = kernel_read(filp, &buf, sizeof(buf), &pos);
- if (ret < 0)
- pr_err("%s read %s file fail ret=%ld!\n",
- __func__, path, (long)ret);
- filp_close(filp, NULL);
- }
 
- if ('Y' == *buf)
- result = true;
- }
+ if (!boot_cpu_has(X86_FEATURE_CPPC))
+ result = true;
 
  return result;
 }