kernel: remove linux 4.3 support

package/kernel/linux/modules/crypto.mk

package/kernel/linux/modules/netsupport.mk

...x/generic/patches-4.3/000-keep_initrafs_the_default.patch

target/linux/generic/patches-4.3/020-bcma-from-4.4.patch

target/linux/generic/patches-4.3/020-ssb-backport.patch

target/linux/generic/patches-4.3/021-bcma-from-4.5.patch

target/linux/generic/patches-4.3/022-bcma-from-4.6.patch

.../generic/patches-4.3/050-backport_netfilter_rtcache.patch

...x/generic/patches-4.3/060-mips_decompressor_memmove.patch

...3/072-13-bgmac-fix-MAC-soft-reset-bit-for-corerev-4.patch

...hes-4.3/072-14-bgmac-reset-all-4-GMAC-cores-on-init.patch

...ric/patches-4.3/090-m25p80_spi-nor_update_to_4.4rc1.patch

...s-4.3/101-MIPS-fix-cache-flushing-for-highmem-pages.patch

...et/linux/generic/patches-4.3/102-ehci_hcd_ignore_oc.patch

.../generic/patches-4.3/103-packet_allow_empty_payload.patch

...-jffs2-use-.rename2-and-add-RENAME_WHITEOUT-support.patch

...c/patches-4.3/111-jffs2-add-RENAME_EXCHANGE-support.patch

...es-4.3/120-bridge_allow_receiption_on_disabled_port.patch

...t/linux/generic/patches-4.3/132-mips_inline_dma_ops.patch

...40-mtd-part-add-generic-parsing-of-linux-part-probe.patch