wandboard: adding Wandboard to list of SGTL5000 boards

The sound subsystem Kconfig file uses MACH_<board> to select whether
the SGTL5000 is selectable as a sound device.  Add Wandboard to the
list of boards that are used.
wandboard: update defconfig file

Update the wandboard defconfig file to reflect a closer alignment to
the default configurations of the Freescale reference boards.  Here
is a high-level summary of changes:

- Disable SWAP, as we do not have a swap partition
- Enable/disable certain ARM errata workarounds
- Enable audio and SGTL5000
- Build all cpufreq modes
- Touchscreen and keyboard input support
- DRM support converted from built-in to modules
- Added some USB gadget support
- Added default crypto options and hardware crypto support (FSL CAAM)
Revert "gpu-viv: Avoid using uninitialized variables"

With the current default configuration, this commit is no longer needed.
Avoid patching specialized driver files such as the GPU.

This reverts commit c0fceed3315ed3167cd024a6b5a27b7c711a0d22.