libfdt: update from upstream dtc commit 142419e

commit 142419e "dtc/libfdt: sparse fixes", for u-boot's libfdt copy.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Cc: Jerry Van Baren <gvb.uboot@gmail.com>
diff --git a/lib/libfdt/fdt_wip.c b/lib/libfdt/fdt_wip.c
index e373677..63e67b7 100644
--- a/lib/libfdt/fdt_wip.c
+++ b/lib/libfdt/fdt_wip.c
@@ -78,7 +78,7 @@
 
 static void _fdt_nop_region(void *start, int len)
 {
-	uint32_t *p;
+	fdt32_t *p;
 
 	for (p = start; (char *)p < ((char *)start + len); p++)
 		*p = cpu_to_fdt32(FDT_NOP);