Revert "Disable the entire addrinfo struct on devkitppc"

This reverts commit 0254577.

This commit is reversed because the s! macro can only appear once per
module. However it is not possible to cfg-gate a structure inside of the
macro

Author: DarkKirb

src/unix/newlib/mod.rs

@@ -23,8 +23,6 @@ pub type tcflag_t = ::c_uint;
 pub type time_t = i32;
 pub type useconds_t = u32;
 
-#[cfg(not(all(libc_cfg_target_vendor, target_arch = "powerpc",
-      target_vendor = "nintendo")))]
 s! {
     // The order of the `ai_addr` field in this struct is crucial
     // for converting between the Rust and C types.
@@ -35,19 +33,21 @@ s! {
         pub ai_protocol: ::c_int,
         pub ai_addrlen: socklen_t,
 
+        #[cfg(not(all(libc_cfg_target_vendor, target_arch = "powerpc",
+              target_vendor = "nintendo")))]
         #[cfg(target_arch = "xtensa")]
         pub ai_addr: *mut sockaddr,
 
         pub ai_canonname: *mut ::c_char,
 
+        #[cfg(not(all(libc_cfg_target_vendor, target_arch = "powerpc",
+              target_vendor = "nintendo")))]
         #[cfg(not(target_arch = "xtensa"))]
         pub ai_addr: *mut sockaddr,
 
         pub ai_next: *mut addrinfo,
     }
-}
 
-s! {
     pub struct ip_mreq {
         pub imr_multiaddr: in_addr,
         pub imr_interface: in_addr,