msm: camera: Remove ion members from msm_frame structure definition

Remove struct members that were accidentally 
added by commit 5f7e75ae ("msm: camera: Port msm-4.9 camera 
kernel on msm-4.14 kernel").

Change-Id: I105a1cba4d3a479105679c9f78f15ff88b927d05
Signed-off-by: Abhishek Jain <abhij@codeaurora.org>