Revert "db845c/BoardConfig.mk: set bootv3 as the default" am: e85af9cf46 am: 2b52c79ebf

Original change: https://android-review.googlesource.com/c/device/linaro/dragonboard/+/1656128

Change-Id: I3dc038e7eee24366d7ae0fe247ceccdad6e0c2e5
diff --git a/db845c/BoardConfig.mk b/db845c/BoardConfig.mk
index 5f4d343..d668719 100644
--- a/db845c/BoardConfig.mk
+++ b/db845c/BoardConfig.mk
@@ -6,7 +6,6 @@
 
 TARGET_NO_KERNEL := false
 BOARD_INCLUDE_DTB_IN_BOOTIMG := true
-TARGET_USES_BOOT_HDR_V3 ?= true
 ifeq ($(TARGET_USES_BOOT_HDR_V3), true)
  BOARD_BOOT_HEADER_VERSION := 3
  BOARD_KERNEL_PAGESIZE := 4096