arm64: dts: exynos: Fix interrupt type for I2S1 device on Exynos5433

arm64: dts: exynos: Fix interrupt type for I2S1 device on Exynos5433

All interrupts from SoC internal modules are level triggered, so fix
incorrect trigger type for I2S1 device on Exynos5433 SoCs.

This fixes following kernel warning:

WARNING: CPU: 2 PID: 1 at drivers/irqchip/irq-gic.c:1016 gic_irq_domain_translate+0xb0/0xb8
Modules linked in:
CPU: 2 PID: 1 Comm: swapper/0 Not tainted 4.16.0-rc7-next-20180329 #646
Hardware name: Samsung TM2 board (DT)
pstate: 20000005 (nzCv daif -PAN -UAO)
pc : gic_irq_domain_translate+0xb0/0xb8
lr : irq_create_fwspec_mapping+0x64/0x328
sp : ffff0000098b38d0
...
Call trace:
 gic_irq_domain_translate+0xb0/0xb8
 irq_create_of_mapping+0x78/0xa0
 of_irq_get+0x6c/0xa0
 of_irq_to_resource+0x38/0x108
 of_irq_to_resource_table+0x50/0x78
 of_device_alloc+0x118/0x1b8
 of_platform_device_create_pdata+0x54/0xe0
 of_platform_bus_create+0x118/0x340
 of_platform_bus_create+0x17c/0x340
 of_platform_populate+0x74/0xd8
 of_platform_default_populate_init+0xb0/0xcc
 do_one_initcall+0x50/0x158
 kernel_init_freeable+0x184/0x22c
 kernel_init+0x10/0x108
 ret_from_fork+0x10/0x18
---[ end trace 6decb2b3078d73f0 ]---

Fixes: d8d579c316e8 ("ARM: dts: exynos: Add I2S1 device node to exynos5433")
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Olof Johansson <olof@lixom.net>