irqchip/renesas-rzv2h: Use devm_reset_control_get_exclusive_deasserted()

irqchip/renesas-rzv2h: Use devm_reset_control_get_exclusive_deasserted()

Use devm_reset_control_get_exclusive_deasserted() to simplify
rzv2h_icu_init().

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Link: https://lore.kernel.org/all/20250224131253.134199-6-biju.das.jz@bp.renesas.com