package/python-rpi-ws281x: set proper license

The license is BSD-2-Clause, not MIT.

Signed-off-by: Grzegorz Blach <grzegorz@blach.pl>
[yann.morin.1998@free.fr: split off into its own commit]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 7b5d624bb66f29a20c96fcfc85741cdd61154eef)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python-rpi-ws281x/python-rpi-ws281x.mk

@@ -8,7 +8,7 @@ PYTHON_RPI_WS281X_VERSION = 4.2.3
 PYTHON_RPI_WS281X_SOURCE = rpi_ws281x-$(PYTHON_RPI_WS281X_VERSION).tar.gz
 PYTHON_RPI_WS281X_SITE = https://files.pythonhosted.org/packages/03/6c/46fad1bace9d5917190fd76e1550ec6727010cff6d3e5818b8c3a5405ba3
 PYTHON_RPI_WS281X_SETUP_TYPE = setuptools
-PYTHON_RPI_WS281X_LICENSE = MIT
+PYTHON_RPI_WS281X_LICENSE = BSD-2-Clause
 PYTHON_RPI_WS281X_LICENSE_FILES = LICENSE lib/LICENSE
 
 $(eval $(python-package))