replace DEPENDS=+@IPV6 with DEPENDS=@IPV6

The symbol IPV6 is a global config symbol, don't select it because it
will override the user decision of IPV6 as all other package in base do
it. A select (+) will also create a recursive dependency error.

Signed-off-by: Alexander Couzens <lynxis@fe80.eu>

ahcpd/Makefile

@@ -25,7 +25,7 @@ define Package/ahcpd
   TITLE:=Ad-Hoc Configuration Protocol daemon
   URL:=http://www.pps.univ-paris-diderot.fr/~jch/software/ahcp/
   MAINTAINER:=Gabriel Kerneis <gabriel@kerneis.info>
-  DEPENDS:=+@IPV6 +ip +librt
+  DEPENDS:=@IPV6 +ip +librt
 endef
 
 define Package/ahcpd/description

babeld/Makefile

@@ -25,7 +25,7 @@ define Package/babeld
   TITLE:=A loop-free distance-vector routing protocol
   URL:=http://www.pps.univ-paris-diderot.fr/~jch/software/babel/
   MAINTAINER:=Gabriel Kerneis <gabriel@kerneis.info>
-  DEPENDS:=+@IPV6
+  DEPENDS:=@IPV6
 endef
 
 define Package/babeld/description

hnetd/Makefile

@@ -38,7 +38,7 @@ define Package/hnetd/Default
   TITLE:=HNCP Homenet daemon - $(2)
   URL:=https://github.com/sbyx/hnetd
   DEPENDS:=+odhcpd +odhcp6c +netifd $(3)
-  DEPENDS+=+@IPV6
+  DEPENDS+=@IPV6
   VARIANT:=$1
 endef
 

minimalist-pcproxy/Makefile

@@ -27,7 +27,7 @@ define Package/minimalist-pcproxy
   CATEGORY:=Network
   TITLE:=Lightweight PCP proxy
   URL:=https://github.com/fingon/minimalist-pcproxy
-  DEPENDS:=+libubox +@IPV6
+  DEPENDS:=+libubox @IPV6
 endef
 
 define Package/minimalist-pcproxy/description

pimbd/Makefile

@@ -24,7 +24,7 @@ define Package/pimbd
   CATEGORY:=Network
   TITLE:=PIM BIDIR daemon
   URL:=https://github.com/Oryon/pimbd.git
-  DEPENDS+=+@IPV6
+  DEPENDS+=@IPV6
   DEPENDS+=netifd
 endef