msm: camera: jpeg: Increase number of jpeg contexts

Fixed out of memory issue in triple camera usecase by increasing
number of logical jpeg contexts.

CRs-Fixed: 2587592
Change-Id: I25c99c0be8d3986bc11fbc2894a0dbf27c645d4e
Signed-off-by: Suraj Dongre <sdongre@codeaurora.org>
Signed-off-by: Mukund Madhusudan Atre <matre@codeaurora.org>