cpufreq/amd-pstate: Fix non kerneldoc comment

The comment for amd_cppc_supported() isn't meant to be kernel doc.

Fixes: cb817ec ("cpufreq: amd-pstate: show CPPC debug message if CPPC is not supported")
Link: https://lore.kernel.org/r/20240905162351.1345560-1-superm1@kernel.org
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>

drivers/cpufreq/amd-pstate.c

@@ -1774,7 +1774,7 @@ static int __init amd_pstate_set_driver(int mode_idx)
 	return -EINVAL;
 }
 
-/**
+/*
  * CPPC function is not supported for family ID 17H with model_ID ranging from 0x10 to 0x2F.
  * show the debug message that helps to check if the CPU has CPPC support for loading issue.
  */