esoc: Use BOOT mode indicating mdm2ap status high

Put modem in BOOT mode representing the state where mdm2ap
status has gone high but the efs pipe is not yet established.
Differenciating boot and run state helps handle error fatal
interrupts better.

Change-Id: Ifbc24468be67ba6f56a3dd2ca20e404949fb2ceb
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>