net/dccp: remove depends on CONFIG_EXPERIMENTAL

The CONFIG_EXPERIMENTAL config item has not carried much meaning for a
while now and is almost always enabled by default. As agreed during the
Linux kernel summit, remove it from any "depends on" lines in Kconfigs.

CC: Gerrit Renker <gerrit@erg.abdn.ac.uk>
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>

net/dccp/Kconfig

 menuconfig IP_DCCP
-	tristate "The DCCP Protocol (EXPERIMENTAL)"
-	depends on INET && EXPERIMENTAL
+	tristate "The DCCP Protocol"
+	depends on INET
 	---help---
 	  Datagram Congestion Control Protocol (RFC 4340)