ARM: imx_v6_v7_defconfig: Enable Tarragon peripheral drivers

We need to enable some drivers in order to use the following peripherals
of Tarragon:
  * QCA7000/7005 Powerline chip
  * One-Wire Master DS2484 with external thermal sensors
  * external 4 pin PWM fan
  * ST IIS328DQ I2C accelerometer

Signed-off-by: Stefan Wahren <stefan.wahren@chargebyte.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>