arm64: dts: agilex/stratix10: fix pmu interrupt numbers

Fix up the correct interrupt numbers for the PMU unit on Agilex
and Stratix10.

Fixes: 78cd6a9d

 ("arm64: dts: Add base stratix 10 dtsi")
Cc: linux-stable <stable@vger.kernel.org>
Reported-by: Meng Li <Meng.Li@windriver.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>