bootloader: nakasi: subject bootloader version to 3.38.

What's new in this release?
    1. Support TI PMIC

Change-Id: I3b31262d338460a7005821a486633ed562845d00
diff --git a/board-info.txt b/board-info.txt
index 803df3c..4390af6 100644
--- a/board-info.txt
+++ b/board-info.txt
@@ -1,2 +1,2 @@
 require board=grouper
-require version-bootloader=3.37
+require version-bootloader=3.38