sparc32: move probe_memory() to srmmu.c

Only one user so move it to the file using it.
It had nothing to do in fault_32.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index ad93d2e..c38bb72 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -228,7 +228,17 @@
 static void srmmu_early_allocate_ptable_skeleton(unsigned long start,
 						 unsigned long end);
 
-extern unsigned long probe_memory(void);	/* in fault.c */
+/* Return how much physical memory we have.  */
+static unsigned long __init probe_memory(void)
+{
+	unsigned long total = 0;
+	int i;
+
+	for (i = 0; sp_banks[i].num_bytes; i++)
+		total += sp_banks[i].num_bytes;
+
+	return total;
+}
 
 /*
  * Reserve nocache dynamically proportionally to the amount of