busybox: 1.17.x.config: enable microcom applet

So we can get rid of the deprecated microcom package.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/busybox/busybox-1.17.x.config

@@ -668,7 +668,7 @@ CONFIG_MAKEDEVS=y
 # CONFIG_FEATURE_MAKEDEVS_LEAF is not set
 CONFIG_FEATURE_MAKEDEVS_TABLE=y
 # CONFIG_MAN is not set
-# CONFIG_MICROCOM is not set
+CONFIG_MICROCOM=y
 CONFIG_MOUNTPOINT=y
 CONFIG_MT=y
 # CONFIG_RAIDAUTORUN is not set