Define dummy functions to mdmon.c

Definitions are necessary to compile mdmon.
Metadata specific source code is compiled to mdmon.
Functions used for reshape check pointing:
- restore_stripes()
- save_stripes
- abort_reshape
are not used in mdmon, but they are compiled in it.
To enable mdmon compilation, dummy functions are used.

Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: Krzysztof Wojcik <krzysztof.wojcik@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>

mdmon.c

@@ -527,3 +527,26 @@ int child_monitor(int afd, struct mdinfo *sra, struct reshape *reshape,
 {
 	return 0;
 }
+
+int restore_stripes(int *dest, unsigned long long *offsets,
+		    int raid_disks, int chunk_size, int level, int layout,
+		    int source, unsigned long long read_offset,
+		    unsigned long long start, unsigned long long length,
+		    char *src_buf)
+{
+	return 1;
+}
+
+void abort_reshape(struct mdinfo *sra)
+{
+	return;
+}
+
+int save_stripes(int *source, unsigned long long *offsets,
+		 int raid_disks, int chunk_size, int level, int layout,
+		 int nwrites, int *dest,
+		 unsigned long long start, unsigned long long length,
+		 char *buf)
+{
+	return 0;
+}