linux-samsung-chagallwifi: switch kernel sources

With these kernel sources the device boots successfully, sometimes. Usually, kernel panics and device reboots a couple of times, but after a few attempts (maybe 1, maybe 7) it succeeds to boot and I can ssh into it. The problems seem to be related to FIMC IS, unfortunately it does not seem to be possible to just disable it in the kernel config, as that leads to compilation errors...

I have so far just experimented with getting wifi up and running, but it does not work out of the box even after adding firmware package with files from TheMuppets, wpa_supplicant fails to connect and dmesg is filed with lines like:

[  112.509235]  [L0: wl_event_handle:  3109] CFG80211-INFO2) wl_escan_handler : Couldn't find P2PIE in probe response/beacon

The config changes here are the ones I get after pmbootstrap kconfig edit linux-samsung-chagallwifi and then just saving it with the updated kernel sources.