dm: MIGRATION: Add migration plan for DM_USB

As much of the USB system has been migrated to DM now, formalize a
deadline for migration.
Reviewed-by: NMarek Vasut <marex@denx.de>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NTom Rini <trini@konsulko.com>

Makefile

@@ -929,6 +929,16 @@ ifneq ($(CONFIG_DM_MMC)$(CONFIG_OF_CONTROL)$(CONFIG_BLK),yyy)
 	@echo "See doc/driver-model/MIGRATION.txt for more info."
 	@echo "===================================================="
 endif
+endif
+ifeq ($(CONFIG_USB),y)
+ifneq ($(CONFIG_DM_USB)$(CONFIG_OF_CONTROL)$(CONFIG_BLK),yyy)
+	@echo "===================== WARNING ======================"
+	@echo "This board does not use CONFIG_DM_USB. Please update"
+	@echo "the board to use CONFIG_DM_USB before the v2019.07 release."
+	@echo "Failure to update by the deadline may result in board removal."
+	@echo "See doc/driver-model/MIGRATION.txt for more info."
+	@echo "===================================================="
+endif
 endif
 	@# Check that this build does not use CONFIG options that we do not
 	@# know about unless they are in Kconfig. All the existing CONFIG

doc/driver-model/MIGRATION.txt

@@ -15,6 +15,16 @@ The subsystem itself has been converted and maintainers should submit patches
 switching over to using CONFIG_DM_MMC and other base driver model options in
 time for inclusion in the 2019.04 rerelease.
 
+CONFIG_DM_USB
+-------------
+
+Status: In progress
+Deadline: 2019.07
+
+The subsystem itself has been converted along with many of the host controller
+and maintainers should submit patches switching over to using CONFIG_DM_USB and
+other base driver model options in time for inclusion in the 2019.07 rerelease.
+
 CONFIG_BLK
 ----------