common/board_f: add setup of initial stack frame for MIPS

The MIPS specific setup of the initial stack frame was not
ported to generic board_f.
Signed-off-by: NDaniel Schwierzeck <daniel.schwierzeck@gmail.com>

common/board_f.c

@@ -579,7 +579,7 @@ static int reserve_stacks(void)
 	gd->irq_sp = gd->start_addr_sp;
 # endif
 #else
-# ifdef CONFIG_PPC
+# if defined(CONFIG_PPC) || defined(CONFIG_MIPS)
 	ulong *s;
 # endif
 
@@ -609,6 +609,12 @@ static int reserve_stacks(void)
 	s = (ulong *) gd->start_addr_sp;
 	*s = 0; /* Terminate back chain */
 	*++s = 0; /* NULL return address */
+# elif defined(CONFIG_MIPS)
+	/* Clear initial stack frame */
+	s = (ulong *) gd->start_addr_sp;
+	*s-- = 0;
+	*s-- = 0;
+	gd->start_addr_sp = (ulong) s;
 # endif /* Architecture specific code */
 
 	return 0;