kunit: Fix some comments which were mistakenly kerneldoc

The KUnit device helpers are documented with kerneldoc in their header
file, but also have short comments over their implementation. These were
mistakenly formatted as kerneldoc comments, even though they're not
valid kerneldoc. It shouldn't cause any serious problems -- this file
isn't included in the docs -- but it could be confusing, and causes
warnings.

Remove the extra '*' so that these aren't treated as kerneldoc.

Fixes: d03c720e ("kunit: Add APIs for managing devices")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202312181920.H4EPAH20-lkp@intel.com/Signed-off-by: David Gow <davidgow@google.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

lib/kunit/device.c

@@ -60,7 +60,7 @@ static void kunit_device_release(struct device *d)
 	kfree(to_kunit_device(d));
 }
 
-/**
+/*
  * Create and register a KUnit-managed struct device_driver on the kunit_bus.
  * Returns an error pointer on failure.
  */
@@ -124,7 +124,7 @@ static struct kunit_device *kunit_device_register_internal(struct kunit *test,
 	return kunit_dev;
 }
 
-/**
+/*
  * Create and register a new KUnit-managed device, using the user-supplied device_driver.
  * On failure, returns an error pointer.
  */
@@ -141,7 +141,7 @@ struct device *kunit_device_register_with_driver(struct kunit *test,
 }
 EXPORT_SYMBOL_GPL(kunit_device_register_with_driver);
 
-/**
+/*
  * Create and register a new KUnit-managed device, including a matching device_driver.
  * On failure, returns an error pointer.
  */