brcm2708: remove 3.14 support

target/linux/brcm2708/config-3.14

.../brcm2708/patches-3.14/0001-Main-bcm2708-linux-port.patch

...t/linux/brcm2708/patches-3.14/0002-Add-quick-config.patch

...linux/brcm2708/patches-3.14/0003-Add-dwc_otg-driver.patch

.../brcm2708/patches-3.14/0004-bcm2708-watchdog-driver.patch

...cm2708/patches-3.14/0005-bcm2708-framebuffer-driver.patch

...nux/brcm2708/patches-3.14/0006-bcm2708-vchiq-driver.patch

...7-vchiq-Avoid-high-load-when-blocked-and-unkillable.patch

....14/0008-cma-Add-vc_cma-driver-to-enable-use-of-CMA.patch

...rcm2708/patches-3.14/0009-bcm2708-alsa-sound-driver.patch

...lsa-add-mmap-support-and-some-cleanups-to-bcm2835-A.patch

...1-Add-hwrng-hardware-random-number-generator-driver.patch

...s-3.14/0012-lirc-added-support-for-RaspberryPi-GPIO.patch

.../brcm2708/patches-3.14/0013-Fixes-for-sdhci-bcm2708.patch

...linux/brcm2708/patches-3.14/0014-Add-cpufreq-driver.patch

...dded-hwmon-thermal-driver-for-reporting-core-temper.patch

...s-3.14/0016-Allow-mac-address-to-be-set-in-smsc95xx.patch

...ches-3.14/0017-Add-Chris-Boot-s-i2c-and-spi-drivers.patch

...018-Perform-I2C-combined-transactions-when-possible.patch

...nabling-the-realtime-clock-1-wire-chip-DS1307-and-1.patch