usb: chipidea: debug: remove redundant 'role' debug file

Two 'role' file exist in different position but with totally same function.

1. /sys/devices/platform/soc@0/xxxxxxxx.usb/ci_hdrc.0/role
2. /sys/kernel/debug/usb/ci_hdrc.0/role

This will remove the 2rd redundant 'role' debug file (under debugfs) and
keep the one which is more closer to user.

Acked-by: Peter Chen <peter.chen@kernel.org>
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Link: https://lore.kernel.org/r/20230317061651.2457567-1-xu.yang_2@nxp.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>