usb: renesas_usbhs: Replace deprecated API of extcon

This patch removes the deprecated API of extcon and then use the new extcon API
with the unique id to indicate the each external connector (USB-HOST).
- extcon_get_cable_state(*edev, char *) -> extcon_get_cable_state_(*edev, id)

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: Peter Chen <peter.chen@freescale.com>
Cc: Varka Bhadram <varkab@cdac.in>
Cc: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>