irqchip/starfive-jh8100: Fix section mismatch

irqchip/starfive-jh8100: Fix section mismatch

[ Upstream commit f798bdb9aa81c425184f92e3d0b44d3b53d10da7 ]

Platform drivers can be probed after their init sections have been
discarded so the irqchip init callback must not live in init.

Fixes: e4e535036173 ("irqchip: Add StarFive external interrupt controller")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Changhuang Liang <changhuang.liang@starfivetech.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>