guest : Removed ARM architecture dependencies in guest context

We have to integrate both files(guest.c, context.c). and create a hal
directory for arm32ve. After all, we plan to move there, regarding
the part of architecture-specific code.
Merge pull request #168 from joohyun0115/guest

guest : Removed ARM architecture dependencies in guest context
hardware : move ARM architecture dependency source into arm32ve

This patch set is move ARM architecture dependency source
into arm32ve(except interrupt, memory).
Merge pull request #172 from joohyun0115/guest

hardware : move ARM architecture dependency source into arm32ve
Remove an unnecessary header file
Merge pull request #175 from Wonseok/v1

Removed an unnecessary header file
arm32ve : change static function that is not called from outside