GFS2: Rename eattr.[ch] as xattr.[ch]

Use the more conventional name for the extended attribute
support code. Update all the places which care.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 7a5c128..2e78a3f 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -38,7 +38,7 @@
 #include "trans.h"
 #include "util.h"
 #include "sys.h"
-#include "eattr.h"
+#include "xattr.h"
 
 #define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x)