UBIFS: introduce a separate structure for budgeting info

This patch separates out all the budgeting-related information
from 'struct ubifs_info' to 'struct ubifs_budg_info'. This way the
code looks a bit cleaner. However, the main driver for this is
that we want to save budgeting information and print it later,
so a separate data structure for this is helpful.

This patch is a preparation for the further debugging output
improvements.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 7217d67..ef5abd3 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -603,7 +603,7 @@
 		ubifs_release_budget(c, &req);
 	else {
 		/* We've deleted something - clean the "no space" flags */
-		c->nospace = c->nospace_rp = 0;
+		c->bi.nospace = c->bi.nospace_rp = 0;
 		smp_wmb();
 	}
 	return 0;
@@ -693,7 +693,7 @@
 		ubifs_release_budget(c, &req);
 	else {
 		/* We've deleted something - clean the "no space" flags */
-		c->nospace = c->nospace_rp = 0;
+		c->bi.nospace = c->bi.nospace_rp = 0;
 		smp_wmb();
 	}
 	return 0;