arm64: dts: exynos: drop incorrectly placed wakeup interrupts in Exynos850

The pin controller device node is expected to have one (optional)
interrupt.  Its pin banks capable of external interrupts, should define
interrupts for each pin, unless a muxed interrupt is used.

Exynos850 defined the second part - interrupt for each pin in wake-up
pin controller - but also added these interrupts in main device node,
which is not correct.

Fixes: e3493220fd3e ("arm64: dts: exynos: Add initial Exynos850 SoC support")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Tested-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20211230195325.328220-3-krzysztof.kozlowski@canonical.com