mhi: cntrl: qcom: reduce timesync and bootlogger log buffer size

Much of the IPC log buffer size allocated to the sparsely
used time synchronization is unused and bootlogger is allocated
more than it needs. Reduce the sizes for the same.

Change-Id: I342cd077d00d38a0fb737605e6e43577edc05396
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>