dtoc: Put each phandle on a separate line

When writing values from properties which contain phandles, dtoc currently
writes 8 phandles per line. Change this to write one phandle per line.
This helps reduce line length, since phandles are generally longer and may
have arguments.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/tools/dtoc/test_dtoc.py b/tools/dtoc/test_dtoc.py
index 23c4439..aa617a6 100644
--- a/tools/dtoc/test_dtoc.py
+++ b/tools/dtoc/test_dtoc.py
@@ -252,7 +252,8 @@
 };
 
 static struct dtd_source dtv_phandle_source = {
-\t.clocks\t\t\t= {{&dtv_phandle_target, 1}},
+\t.clocks\t\t\t= {
+\t\t{&dtv_phandle_target, 1},},
 };
 U_BOOT_DEVICE(phandle_source) = {
 \t.name\t\t= "source",