irqchip updates for 4.18

- Support for Meson-AXG GPIO irqchip
- Large stm32 irqchip rework (suspend/resume, hierarchical domains)
ARM: dts: stm32: Add exti support to stm32mp157 pinctrl

This patch adds support of external interrupt for
gpio[a..k], gpioz

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
1 file changed