irqchip/renesas-rzg2l: Replace rzg2l_irqc_irq_{enable,disable} with TINT-specific...

irqchip/renesas-rzg2l: Replace rzg2l_irqc_irq_{enable,disable} with TINT-specific handlers

rzg2l_irqc_irq_disable() and rzg2l_irqc_irq_enable() are used by both the
IRQ and TINT chips, but only perform TINT-specific work via
rzg2l_tint_irq_endisable(), guarded by a hw_irq range check.

Since the IRQ chip does not require this extra enable/disable handling,
replace its callbacks with the generic irq_chip_disable_parent() and
irq_chip_enable_parent() directly.

While at it, simplify rzfive_irqc_irq_enable() by replacing raw_spin_lock
locking/unlocking with guard() and update the variable types of offset,
tssr_offset, and tssr_index to unsigned int, as these variables are used
only for calculation.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260325192451.172562-9-biju.das.jz@bp.renesas.com