drivers: esoc: Don't increment pon counter incase of retry

While setting the number of pon tries the retry from mdm-helper
can't be taken into account. So don't increase the pon_trial
counter when mdm-helper sends retry command to esoc, as it might
affect the sequence set from userspace.

Change-Id: Ic1fb333cba629e33560d0db66c5da80145c9c47a
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>