can: rcar_can: Do not print virtual addresses

During probe, the rcar_can driver prints:

    rcar_can e6e80000.can: device registered (regs @ e08bc000, IRQ76)

The "regs" value is a virtual address, exposing internal information,
hence stop printing it.  The (useful) physical address is already
printed as part of the device name.

Fixes: fd115931

 ("can: add Renesas R-Car CAN driver")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>