package/rpi-firmware: bump version

Bump bootloader and GPU firmware for misc fixes:
  - cec fixes
  - DTS buffering
  - others (pause_burst_frames enabled by default. WTF is that?)

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>