ACPI: property: Satisfy kernel doc validator (part 2)

CHECK   drivers/acpi/property.c
 warning: Function parameter or member '__fwnode' not described in 'acpi_graph_get_remote_endpoint'
 warning: Excess function parameter 'fwnode' description in 'acpi_graph_get_remote_endpoint'
 warning: Excess function parameter 'endpoint' description in 'acpi_graph_get_remote_endpoint'

Fixes: 0ef74786 ("ACPI: property: Make the ACPI graph API private")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>