Revert "target,base-files: unify handling of procd-ujail"

This reverts commit ac640718aa as it
removes base-files package when KERNEL_NAMESPACES is deselected, as
base-files depends on procd-ujail which needs KERNEL_NAMESPACES.

Fixes: #17075
Link: https://github.com/openwrt/openwrt/pull/17081
Link: https://github.com/openwrt/openwrt/pull/17081
Signed-off-by: Petr Štetiar <ynezz@true.cz>

include/target.mk

@@ -90,6 +90,11 @@ else
   endif
 endif
 
+# include ujail on systems with enough storage
+ifeq ($(filter small_flash,$(FEATURES)),)
+  DEFAULT_PACKAGES+=procd-ujail
+endif
+
 # Add device specific packages (here below to allow device type set from subtarget)
 DEFAULT_PACKAGES += $(DEFAULT_PACKAGES.$(DEVICE_TYPE))