cns3xxx: drop 3.14 support

target/linux/cns3xxx/config-3.14

...linux/cns3xxx/patches-3.14/000-cns3xxx_arch_include.patch

.../linux/cns3xxx/patches-3.14/001-cns3xxx_section_fix.patch

...atches-3.14/010-arm_introduce-dma-fiq-irq-broadcast.patch

target/linux/cns3xxx/patches-3.14/020-watchdog_support.patch

target/linux/cns3xxx/patches-3.14/025-smp_support.patch

target/linux/cns3xxx/patches-3.14/030-pcie_clock.patch

target/linux/cns3xxx/patches-3.14/040-fiq_support.patch

target/linux/cns3xxx/patches-3.14/045-twd_base.patch

target/linux/cns3xxx/patches-3.14/055-pcie_io.patch

target/linux/cns3xxx/patches-3.14/060-pcie_abort.patch

target/linux/cns3xxx/patches-3.14/065-pcie_early_init.patch

target/linux/cns3xxx/patches-3.14/070-i2c_support.patch

target/linux/cns3xxx/patches-3.14/075-spi_support.patch

target/linux/cns3xxx/patches-3.14/080-sata_support.patch

target/linux/cns3xxx/patches-3.14/085-ethernet_support.patch

target/linux/cns3xxx/patches-3.14/090-timers.patch

target/linux/cns3xxx/patches-3.14/095-gpio_support.patch

...linux/cns3xxx/patches-3.14/097-l2x0_cmdline_disable.patch

target/linux/cns3xxx/patches-3.14/100-laguna_support.patch