Change dct32x32's range

Bitdepth 10/12:
Fit coefficient range into 32 bits
Fit codfficient * const range into 32 bits

Bitdepth 8:
Fit coefficient range into 16 bits
Fit codfficient * constant range into 32 bits

Change-Id: I50b5a3132e8a9f5155c971ab0f6eb52876d2b5ca
3 files changed