power: smb-lib: Update the FLOAT detection logic

An SDP may get detected as a FLOAT charger by PMIC APSD.
To handle this case do the following steps when a FLOAT
charger is detected -

1. Limit the ICL to 100mA and start USB enumeration
2. If enumeration succeeds, USB notifies a valid
   ICL and the charger updates ICL and charger-type to SDP.
3. If enumeration fails, USB notifies -ETIMEDOUT and
   charger applies ICL based on the Rp value.

CRs-Fixed: 2081457
Change-Id: I2747a42ed9f9531e83c53d781a8ae9baa9aa74d0
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>