Convert CONFIG_CMD_HASH to Kconfig

This converts the following to Kconfig:
   CONFIG_CMD_HASH

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
[trini: Rework slightly, enable on some boards again]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/controlcenterd_TRAILBLAZER_defconfig b/configs/controlcenterd_TRAILBLAZER_defconfig
index 8f6e150..d319366 100644
--- a/configs/controlcenterd_TRAILBLAZER_defconfig
+++ b/configs/controlcenterd_TRAILBLAZER_defconfig
@@ -14,6 +14,7 @@
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_MMC=y
 # CONFIG_CMD_SETEXPR is not set
+# CONFIG_CMD_HASH is not set
 CONFIG_CMD_TPM=y
 CONFIG_DOS_PARTITION=y
 CONFIG_DM=y