Fix Sphinx format warnings by adding a blank line.

Documentation/hwmon/xdpe12284.rst:28: WARNING: Unexpected indentation.
Documentation/hwmon/xdpe12284.rst:29: WARNING: Block quote ends without a blank line; unexpected unindent.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jean Delvare <jdelvare@suse.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: linux-hwmon@vger.kernel.org
Cc: Vadim Pasternak <vadimp@mellanox.com>
Link: https://lore.kernel.org/r/0094c570-dd4c-dc0e-386d-ea1c39b6a582@infradead.orgSigned-off-by: Guenter Roeck <linux@roeck-us.net>