rpi3: update firmware to newer version

Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
Signed-off-by: Igor Opaniuk <igor.opaniuk@linaro.org>
diff --git a/rpi3.mk b/rpi3.mk
index 0ad036d..94b0956 100644
--- a/rpi3.mk
+++ b/rpi3.mk
@@ -12,7 +12,7 @@
 # we split it up in three different variables. Note that this should be updated
 # when newer firmware packages will be used.
 RPI3_FIRMWARE_URL = https://github.com/raspberrypi/firmware/archive
-RPI3_FIRMWARE_FILE = 046effa13ebc4cc7601df4f06f4834bd0eebb0f8
+RPI3_FIRMWARE_FILE = da504fcd4c673ecf85841ea80c28a8bb8b94e612
 RPI3_FIRMWARE_FILE_EXT = zip
 
 -include common.mk