hikey: Update board-info.txt to require new UEFI bootloader version

Update board-info.txt bootloader requirement from 0.4 to 0.6 for new
UEFI bootloader version.

Change-Id: Ic4e4f914109051b3a54524b319d2f61fe628cc8c
Signed-off-by: John Stultz <john.stultz@linaro.org>
diff --git a/hikey32/board-info.txt b/hikey32/board-info.txt
index f054721..dd0c2eb 100644
--- a/hikey32/board-info.txt
+++ b/hikey32/board-info.txt
@@ -1,2 +1,2 @@
 require board=hikey
-require version-bootloader=0.4
+require version-bootloader=0.6