dma-direct: use the correct size for dma_set_encrypted()

dma-direct: use the correct size for dma_set_encrypted()

BugLink: https://bugs.launchpad.net/bugs/1986718
commit 3be4562584bba603f33863a00c1c32eecf772ee6 upstream.

The third parameter of dma_set_encrypted() is a size in bytes rather than
the number of pages.

Fixes: 4d0564785bb0 ("dma-direct: factor out dma_set_{de,en}crypted helpers")
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>