package/kernel: move input modules into a separate submenu

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35161 3c298f89-4303-0410-b956-a3cf2f4a3e73
kernel: port 203-kallsyms_uncompressed.patch and 305-mips_module_reloc.patch to 3.8

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35162 3c298f89-4303-0410-b956-a3cf2f4a3e73