powerpc/board: SPL: Enable malloc flag in global data.

For malloc to work in SPL framework enable GD_FLG_FULL_MALLOC_INIT
flag in global data after allocating memory using mem_malloc_init.

Signed-off-by: Sumit Garg <sumit.garg@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/board/freescale/b4860qds/spl.c b/board/freescale/b4860qds/spl.c
index 3f7cc03..fabc783 100644
--- a/board/freescale/b4860qds/spl.c
+++ b/board/freescale/b4860qds/spl.c
@@ -91,6 +91,7 @@
 	get_clocks();
 	mem_malloc_init(CONFIG_SPL_RELOC_MALLOC_ADDR,
 			CONFIG_SPL_RELOC_MALLOC_SIZE);
+	gd->flags |= GD_FLG_FULL_MALLOC_INIT;
 
 #ifndef CONFIG_SPL_NAND_BOOT
 	env_init();