vboot: rename VB2_DISABLE_DEVELOPER_MODE

Rename VB2_DISABLE_DEVELOPER_MODE to VB2_CONTEXT_DISABLE_DEVELOPER_MODE.
Flag name should be consistent with others in vb2_context_flags.

VB2_DISABLE_DEVELOPER_MODE should be removed in subsequent CL.

BUG=b:124141368
TEST=Build locally
BRANCH=none

Change-Id: I42260205e9e27b4bd382cdf69962917d41ca882a
Reviewed-on: https://chromium-review.googlesource.com/1460645
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Joel Kitching <kitching@chromium.org>
Reviewed-by: Joel Kitching <kitching@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
3 files changed