configs: Re-sync with cmd/Kconfig

Update the config.h and defconfig files for the commands that 8e3c036
converted over to Kconfig

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/amcore_defconfig b/configs/amcore_defconfig
index 25826ca..f169fd3 100644
--- a/configs/amcore_defconfig
+++ b/configs/amcore_defconfig
@@ -9,4 +9,5 @@
 # CONFIG_CMD_SETEXPR is not set
 # CONFIG_CMD_NET is not set
 # CONFIG_CMD_NFS is not set
+CONFIG_CMD_CACHE=y
 CONFIG_CMD_TIMER=y