msm: pm2: Send SMSM RESET request to modem

On some senarios when the APPS initiate the PC
seqeunce it informs to modem and wait for MODEM
response back within 2.5sec. If it did not happens
then APPS moves to an indefinite loop and not
responde to any modem communication. This causing
the FS dog timeout after 532sec which is quite
a long time where modem do an ERR fatal.

Send SMSM RESET request to modem when there
is a timeout on APPS (> 2.5sec). This change
will reset the target when the timeout on APPS
is more than 2.5sec.

(Here the time is 50000*50 us = 2.5 Sec)
msm: kgsl: Calculate busy interval considering GPU freq as float