feeds: update berlin-packages to rebased / updates branch SAm0815_exp…

…erimental

feeds.conf

@@ -2,7 +2,7 @@ src-git packages https://github.com/SvenRoederer/openwrt-packages.git^8ce986c3df
 src-git luci https://github.com/openwrt/luci.git^a04e22e846d0269e63cf6c57cb3cfe4080a1c17d
 src-git freifunk https://github.com/SvenRoederer/freifunk_openwrt-packages^0c6579aeb934b83716f7c3da0317d420cc41df70
 src-git routing https://github.com/openwrt-routing/packages.git^5934ad834f6f8df574a1a332bb6a66000978da57
-src-git packages_berlin https://github.com/freifunk-berlin/firmware-packages.git^b55a99c66548272488c574b01bb69b080b688c25
+src-git packages_berlin https://github.com/freifunk-berlin/firmware-packages.git^2784ba64784dcff98f1dbd199463eb07796ca138
 src-git gluon https://github.com/freifunk-gluon/packages.git^aae659d48d29353194501e41c210120471f33a75
 
 ##