Finish CONFIG_VID et al conversion to Kconfig

This converts the following to Kconfig:
   CONFIG_VID
   CONFIG_VOL_MONITOR_INA220
   CONFIG_VOL_MONITOR_IR36021_READ
   CONFIG_VOL_MONITOR_IR36021_SET
   CONFIG_VOL_MONITOR_LTC3882_READ
   CONFIG_VOL_MONITOR_LTC3882_SET

To finish this migration, we first need to introduce CONFIG_SPL_VID as
some platforms only use this code in full U-Boot while others use it in
SPL as well.  To make the Kconfig logic clearer, guard all of the
sub-options with a if VID || SPL_VID check.  Finally, add Kconfig
options for the remaining related options that did not previously have
one.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/T2080RDB_defconfig b/configs/T2080RDB_defconfig
index 7ad8e0f..6b07640 100644
--- a/configs/T2080RDB_defconfig
+++ b/configs/T2080RDB_defconfig
@@ -5,6 +5,10 @@
 CONFIG_ENV_SIZE=0x2000
 CONFIG_ENV_SECT_SIZE=0x20000
 CONFIG_DEFAULT_DEVICE_TREE="t2080rdb"
+CONFIG_VID=y
+CONFIG_VID_FLS_ENV="t208xrdb_vdd_mv"
+CONFIG_VOL_MONITOR_IR36021_READ=y
+CONFIG_VOL_MONITOR_IR36021_SET=y
 CONFIG_MPC85xx=y
 CONFIG_TARGET_T2080RDB=y
 CONFIG_MPC85XX_HAVE_RESET_VECTOR=y