cnss2: Use proper DMA mask based on device ID

Refactor the code to set proper DMA mask based on device ID. Also
set MHI IOVA address range based on the same DMA mask since it will
be more easier to port the driver to non-MSM platforms where there
is no SMMU or IOMMU.

Change-Id: I2daef00b9cb96b81433ed1338b1caf37b4002d80
Signed-off-by: Yue Ma <yuem@codeaurora.org>