A collection of mxs_defconfig updates for 3.7.

* tag 'mxs-defconfig-3.7' of git://git.linaro.org/people/shawnguo/linux-2.6:
  ARM: mxs_defconfig: Add SPI and LRADC support
  ARM: mxs_defconfig: Add framebuffer support
  ARM: mxs_defconfig: Add LED, PWM and MTD_CHAR support
  ARM: mxs_defconfig: Enable USB host