ACPI: CPPC: fix typo in comment

Spelling mistake (triple letters) in comment.
Detected with the help of Coccinelle.
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/cppc_acpi.c

@@ -305,7 +305,7 @@ static int send_pcc_cmd(int pcc_ss_id, u16 cmd)
 		goto end;
 	}
 
-	/* wait for completion and check for PCC errro bit */
+	/* wait for completion and check for PCC error bit */
 	ret = check_pcc_chan(pcc_ss_id, true);
 
 	if (pcc_ss_data->pcc_mrtt)