hw/arm/aspeed: Remove AspeedSoCState dependency from aspeed_mmio_map() API

hw/arm/aspeed: Remove AspeedSoCState dependency from aspeed_mmio_map() API

Refactor aspeed_mmio_map() to take MemoryRegion * instead of
AspeedSoCState *, making the MMIO mapping helper more generic and
decoupled from SoC state.

Update all call sites to pass s->memory (or equivalent) explicitly.
Touched files include: headers, aspeed_soc_common.c, and SoC realize
paths in AST10x0/2400/2600/27x0 (SSP/TSP) and AST2700.

This reduces coupling, improves reuse across variants, and clarifies the
API boundary between SoC state and memory mapping.

No functional change.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20251013054334.955331-6-jamin_lin@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>