ARM: dts: msm: Fix erroneous interrupt mapping for KGSL SMMU for sdm855

The interrupt number to the CPU provided in device node is calculated
as: Interrupt Num = [HW Vector Num] - 32. And not GIC SPI destination
port number. Hence, fix this by providing the right interrupt num.

Change-Id: I022c2af945d5ab219d2dddf425178eff9e3e0da9
Signed-off-by: Sudarshan Rajagopalan <sudaraja@codeaurora.org>