package/rpi-firmware: bump version

Fixes and enhancements for:
  - audio: clock, HDMI passthrough, DTS
  - video playback: unpacked bitstreams
  - 3D: HW textures orientation
  - PWM: boot-time options
  - undisclosed changes

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/rpi-firmware/rpi-firmware.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-RPI_FIRMWARE_VERSION = 98e3be3a7e0ec7d4a86e8edb2177bd8e2bb8728f
+RPI_FIRMWARE_VERSION = bec4bd0f70aa46f55a980996e8774547c0f909c8
 RPI_FIRMWARE_SITE = $(call github,raspberrypi,firmware,$(RPI_FIRMWARE_VERSION))
 RPI_FIRMWARE_LICENSE = BSD-3c
 RPI_FIRMWARE_LICENSE_FILES = boot/LICENCE.broadcom