generic: add linux 4.1 support

Boot tested: http://pastebin.com/L6aAb9xj

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
[jogo:
  update to 4.1 final
  add patches added since submission
  delete patches applied in later rcs
  restore commit messages in 220-gc-sections and 304-mips_disable_fpu
  fix 050-backport_netfilter_rtcache to match new API
  update inlined dma ops with upstream changes
  add missing config symbols
  enabled CONFIG_MULTIUSER
  update kmod defintions for 4.1
]
Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 46112

target/linux/generic/patches-4.1/255-lib80211_kconfig_hacks.patch

@@ -0,0 +1,31 @@
+--- a/net/wireless/Kconfig
++++ b/net/wireless/Kconfig
+@@ -191,7 +191,7 @@ config CFG80211_WEXT_EXPORT
+ 	  wext compatibility symbols to be exported.
+ 
+ config LIB80211
+-	tristate
++	tristate "LIB80211"
+ 	default n
+ 	help
+ 	  This options enables a library of common routines used
+@@ -200,13 +200,16 @@ config LIB80211
+ 	  Drivers should select this themselves if needed.
+ 
+ config LIB80211_CRYPT_WEP
+-	tristate
++	tristate "LIB80211_CRYPT_WEP"
++	select LIB80211
+ 
+ config LIB80211_CRYPT_CCMP
+-	tristate
++	tristate "LIB80211_CRYPT_CCMP"
++	select LIB80211
+ 
+ config LIB80211_CRYPT_TKIP
+-	tristate
++	tristate "LIB80211_CRYPT_TKIP"
++	select LIB80211
+ 
+ config LIB80211_DEBUG
+ 	bool "lib80211 debugging messages"