xfs: don't expect xfs headers to be in subdirectories

Fix up some #include directives in preparation for moving a few
header files out of xfs source subdirectories.

Note that "xfs_linux.h" also got its quoting convention for included
files switched.

Signed-off-by: Alex Elder <aelder@sgi.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

diff --git a/fs/xfs/linux-2.6/xfs_trace.c b/fs/xfs/linux-2.6/xfs_trace.c
index 88d25d4..9010ce8 100644
--- a/fs/xfs/linux-2.6/xfs_trace.c
+++ b/fs/xfs/linux-2.6/xfs_trace.c
@@ -43,8 +43,8 @@
 #include "xfs_quota.h"
 #include "xfs_iomap.h"
 #include "xfs_aops.h"
-#include "quota/xfs_dquot_item.h"
-#include "quota/xfs_dquot.h"
+#include "xfs_dquot_item.h"
+#include "xfs_dquot.h"
 #include "xfs_log_recover.h"
 #include "xfs_inode_item.h"