smb-lib: change debounce time to 20mS while in pr_swap

We observe that while PR_SWAP is done from PD stack, the typeC
block could be running its tCC debounce timer. This causes the
driver to prematurely declare that the cable is removed.

Fix this by reducing the tCC debounce time to 20mS while in
PR_SWAP.

Change-Id: Ie8b3628cd6931ff2da92d95c153d0d2c7ddb20b2
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>