smb-lib: set ICL to 900mA when USB 3.0 has enumerated

900mA can be drawn from a USB 3.0 port that has been enumerated. Do it.

Change-Id: I94e5d36feb3cd54bcc46e8c56933340cad839c1f
Signed-off-by: Nicholas Troast <ntroast@codeaurora.org>
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>