power: smb-lib: Allow PD enable/disable for typeC devices only

Currently if pd is not allowed, we force pd_active to 0 inorder
to run the legacy workaround and rerun apsd. But, this workaround
is required only for typeC devices.

Add a check to prevent PD disable for micro usb device.

Change-Id: I842166f66065c281ab366da327080b09a5e282e1
Signed-off-by: Umang Agrawal <uagrawal@codeaurora.org>