usb: bam: Bail out from resume_work if disconnect happens

Resume_work of the driver currently bails out if suspend happened
immediately after resume, but it doesn't check for disconnect.
BAM pipes resume should be cancelled for disconnect as well
because corresponding pipes and EP contexts are marked invalid
after disconnect.

Change-Id: I842290bd111f9e4be40468b89be0c0dc83e68921
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>