platform/x86: intel-uncore-freq: fix uncore_freq_common_init() error codes

Currently the uncore_freq_common_init() return one on success and
zero on failure.  There is only one caller and it has a "forgot to set
the error code" bug.  Change uncore_freq_common_init() to return
negative error codes which makes the code simpler and avoids this kind
of bug in the future.

Fixes: dbce412a ("platform/x86/intel-uncore-freq: Split common and enumeration part")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20220304131925.GG28739@kiliReviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.c

@@ -231,7 +231,7 @@ int uncore_freq_common_init(int (*read_control_freq)(struct uncore_data *data, u
 		++uncore_instance_count;
 	mutex_unlock(&uncore_lock);
 
-	return (!!uncore_root_kobj);
+	return uncore_root_kobj ? 0 : -ENOMEM;
 }
 EXPORT_SYMBOL_NS_GPL(uncore_freq_common_init, INTEL_UNCORE_FREQUENCY);
 

drivers/platform/x86/intel/uncore-frequency/uncore-frequency.c

@@ -225,7 +225,7 @@ static int __init intel_uncore_init(void)
 
 	ret = uncore_freq_common_init(uncore_read_control_freq, uncore_write_control_freq,
 				      uncore_read_freq);
-	if (!ret)
+	if (ret)
 		goto err_free;
 
 	ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN,