samsung-espresso3g: Update kernel and config for espresso3g
omap4-samsung-espresso3g.dts: Add support for volume keys in the dts. config.samsung-espresso3g.armv7: Clean the defconfig, add BFQ I/O scheduler, enable GPIO_I2C.
omap4-samsung-espresso3g.dts: Add support for volume keys in the dts. config.samsung-espresso3g.armv7: Clean the defconfig, add BFQ I/O scheduler, enable GPIO_I2C.