docs: Add support for ast2700fc machine
- Updated Aspeed family boards list to include `ast2700fc`.
- Added boot instructions for the `ast2700fc` machine.
- Detailed the configuration and loading of firmware for the
Cortex-A35 and Cortex-M4 processors.
Signed-off-by: Steven Lee <steven_lee@aspeedtech.com>
Change-Id: Id41312e9c7cf79bc55c6f24a87a7ad9993dc7261
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250502103449.3091642-10-steven_lee@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>