dt-bindings: mfd: bd71847-pmic: Remove unneeded LED header

There is nothing from <dt-bindings/leds/common.h> that is needed by
the binding example.

Remove the unneeded inclusion.

Signed-off-by: Fabio Estevam <festevam@denx.de>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Matti Vaittinen <mazziesaccount@gmail.com>
Link: https://lore.kernel.org/r/20230804021657.190700-1-festevam@gmail.com


Signed-off-by: Lee Jones <lee@kernel.org>