dmaengine: bcm2835: make license text and module license match

The license text is specifying GPL v2 or later but the MODULE_LICENSE
is set to GPL v2 which means GNU Public License v2 only. So choose the
license text as the correct one.
Signed-off-by: NStefan Wahren <stefan.wahren@i2se.com>
Acked-by: NFlorian Kauer <florian.kauer@koalo.de>
Acked-by: NMartin Sperl <kernel@martin.sperl.org>
Signed-off-by: NVinod Koul <vkoul@kernel.org>

drivers/dma/bcm2835-dma.c

@@ -1056,4 +1056,4 @@ module_platform_driver(bcm2835_dma_driver);
 MODULE_ALIAS("platform:bcm2835-dma");
 MODULE_DESCRIPTION("BCM2835 DMA engine driver");
 MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>");
-MODULE_LICENSE("GPL v2");
+MODULE_LICENSE("GPL");