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_ro.c b/lib/libfdt/fdt_ro.c
index 1933010..1a461c3 100644
--- a/lib/libfdt/fdt_ro.c
+++ b/lib/libfdt/fdt_ro.c
@@ -326,7 +326,7 @@
 
 uint32_t fdt_get_phandle(const void *fdt, int nodeoffset)
 {
-	const uint32_t *php;
+	const fdt32_t *php;
 	int len;
 
 	/* FIXME: This is a bit sub-optimal, since we potentially scan