busybox: 1.13.x defconfig: enable devmem applet

Small and useful for a lot of early hardware testing/verification.

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

package/busybox/busybox-1.13.x.config

@@ -562,7 +562,7 @@ CONFIG_DC=y
 # CONFIG_DEVFSD_FG_NP is not set
 # CONFIG_DEVFSD_VERBOSE is not set
 # CONFIG_FEATURE_DEVFS is not set
-# CONFIG_DEVMEM is not set
+CONFIG_DEVMEM=y
 CONFIG_EJECT=y
 # CONFIG_FEATURE_EJECT_SCSI is not set
 # CONFIG_FBSPLASH is not set