vboot: mark VB2_CONTEXT_FORCE_DEVELOPER_MODE as deprecated

As part of chromium:942901, physical dev switch functionality
is being deprecated.

After CL:1541322 is merged, VB2_CONTEXT_FORCE_DEVELOPER_MODE
will no longer be used, and can be renamed.
(See: src/security/vboot/vboot_logic.c)

BUG=b:124141368, b:124192753, chromium:942901
TEST=make clean && make runtests
TEST=make clean && COV=1 make coverage && make coverage_html
CQ-DEPEND=CL:1541322
BRANCH=none

Change-Id: I3a401a59dc80cb42617a8f3a485d303aa3484c92
Signed-off-by: Joel Kitching <kitching@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1526071
Commit-Ready: Joel Kitching <kitching@chromium.org>
Tested-by: Joel Kitching <kitching@chromium.org>
Reviewed-by: Joel Kitching <kitching@chromium.org>
diff --git a/firmware/2lib/include/2api.h b/firmware/2lib/include/2api.h
index ac4b058..5edbc50 100644
--- a/firmware/2lib/include/2api.h
+++ b/firmware/2lib/include/2api.h
@@ -77,11 +77,12 @@
 
 	/*
 	 * Force developer mode enabled.  Caller may set this flag when
-	 * initializing the context.
+	 * initializing the context.  Previously used for forcing developer
+	 * mode with physical dev switch.
 	 *
 	 * Deprecated as part of chromium:942901.
 	 */
-	VB2_CONTEXT_FORCE_DEVELOPER_MODE = (1 << 5),
+	VB2_CONTEXT_DEPRECATED_FORCE_DEVELOPER_MODE = (1 << 5),
 
 	/* Using firmware slot B.  If this flag is clear, using slot A. */
 	VB2_CONTEXT_FW_SLOT_B = (1 << 6),