msm: pm2: Differentiate between APPS PC & modem early exit for 8625

On system reset, default value of MPA5_GDFS_CNT_VAL is = 0x0,
later modem reprogram this value to 0x00030004. Once APPS did
a power collapse and coming out of it expected value of this
register always be 0x00030004. Incase if APPS sees the value
as 0x00030002 consider this case as a modem early exit. On the
recent builds modem writing the MPA5_GDFS_CNT_VAL to 0x00030004.
Which is breaking initial assumption of differentiation between
the APPS PC & modem early exit.

Change-Id: I2c5fb0c4d03b585680a8d2a43420529c30ac6c64
Signed-off-by: Murali Nalajala <mnalajal@codeaurora.org>