pantah: add requirement for vendor_kernel_boot partition

Bug: 214409109
Signed-off-by: Lucas Wei <lucaswei@google.com>
Change-Id: I756d2bbc730b5901bfe30d415bf519937e8b1ab0
diff --git a/board-info.txt b/board-info.txt
index b06c65a..90cc197 100644
--- a/board-info.txt
+++ b/board-info.txt
@@ -1 +1,2 @@
 require board=cloudripper|ravenclaw|cheetah|panther
+require partition-exists=vendor_kernel_boot