msm: camera: lrme: correct fetch engine width size for P010 format

The lrme fetch engine gets stuck for P010 format. Corresponding KMD
format is CAM_FORMAT_PLAIN16_10. It need two bytes to calculate LRME
width. Double the buffer width to fix this issue for P010 format.

Change-Id: I784d9746c34420e274e3291c95d5032ec9b0f9e6
Signed-off-by: Dong Wang <dongw@codeaurora.org>