hwrng: bcm2835 - fix MODULE_LICENSE tag

The MODULE_LICENSE macro invocation must use either "GPL" or "GPL v2",
but not "GPLv2" in order to be detected by the module loader.

This fixes the allmodconfig build error:

FATAL: modpost: GPL-incompatible module bcm2835-rng.ko uses GPL-only symbol 'platform_driver_unregister'

Signed-off-by: Arnd Bergmann <[email protected]>
Cc: Dom Cobley <[email protected]>
Cc: Lubomir Rintel <[email protected]>
Cc: Stephen Warren <[email protected]>
Cc: Matt Mackall <[email protected]>
Cc: [email protected]
Acked-by: Lubomir Rintel <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
diff --git a/drivers/char/hw_random/bcm2835-rng.c b/drivers/char/hw_random/bcm2835-rng.c
index eb7f147..43577ca 100644
--- a/drivers/char/hw_random/bcm2835-rng.c
+++ b/drivers/char/hw_random/bcm2835-rng.c
@@ -110,4 +110,4 @@
 
 MODULE_AUTHOR("Lubomir Rintel <[email protected]>");
 MODULE_DESCRIPTION("BCM2835 Random Number Generator (RNG) driver");
-MODULE_LICENSE("GPLv2");
+MODULE_LICENSE("GPL v2");