msm: kgsl: Update CP ROQ size for a640 and a680

These targets have ROQ twice as big as a630. So dump
the correct size of ROQ in the snapshot.

Change-Id: I776ece5062d96584f6431475c6ab6a05d2d426c7
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>