usb: pd: Do not fail PD driver probe in case of uAB connector

Remove check for uAB connector in PD driver probe to
support dynamic detection of uAB device. If we fail
PD driver probe in case of uAB connector then our
current handling of extcon handles in dwc3 driver will
keep on defering probe until PD driver get probed successfully.

Change-Id: I5197b05a240a01416e388e81b5770276348de95e
Signed-off-by: Pratham Pratap <prathampratap@codeaurora.org>