qpnp-smb2: don't stomp over D+/D- during hard reset

Currently when we are in hard reset, the driver requests to remove
the float of D+/D- when VBUS drops and once VBUS is back, it requests
to float D+/D- again. This behaviour ends up stomping over D+/D- lines
leading to noncompliance with PD spec.

Fix it by ensuring we only run the CC2 workaround while VBUS dips
in hard reset.

Change-Id: I2bb9364b890b3a227dd3ea3e0a34a415b600e21a
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>