hw/misc/aspeed_hace: Extract SG-mode hash buffer setup into helper function

To improve code readability and maintainability of do_hash_operation(), this
commit introduces a new helper function: hash_prepare_sg_iov().

This function handles scatter-gather (SG) mode setup, including SG list
parsing, address mapping, and optional accumulation mode support with
padding detection.

No functional changes are introduced.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250515081008.583578-6-jamin_lin@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
1 file changed