linux-imx

arm64: KVM: support flushing device memory

In the current implementation, trying to flush
memory not covered by the linear map (e.g. device
memory) causes a crash. Add support for flushing
"non-normal" memory by explicitly ioremap()-ing
it when such a case appears and do the cache flush
through this temporary mapping.
This allows dropping the special checks for qman
cacheable region when doing cache flushes.

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
[fixed formatting issue]
Signed-off-by: Diana Craciun <diana.craciun@nxp.com>