kernel: kmod-lib-objagg: Mark hidden

The Kernel config option CONFIG_OBJAGG has no title and can not be
directly selected. Do the same for this kmod and make it hidden.

Link: https://github.com/openwrt/openwrt/pull/19480
Signed-off-by: Hauke Mehrtens <[email protected]>

package/kernel/linux/modules/lib.mk

@@ -359,6 +359,7 @@ $(eval $(call KernelPackage,oid-registry))
 define KernelPackage/lib-objagg
   SUBMENU:=$(LIB_MENU)
   TITLE:=objagg support
+  HIDDEN:=1
   FILES:=$(LINUX_DIR)/lib/objagg.ko
   KCONFIG:= \
   CONFIG_OBJAGG \