can: rcar_canfd: Add shared_global_irqs to struct rcar_canfd_hw_info

RZ/G2L has separate IRQ lines for receive FIFO and global error interrupt
whereas R-Car has shared IRQ line.

Add shared_global_irqs to struct rcar_canfd_hw_info to select the driver to
choose between shared and separate irq registration for global
interrupts.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/all/20221027082158.95895-4-biju.das.jz@bp.renesas.com


Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>