alsactl: ucm: implement boot parameters and card group sync infrastructure

alsactl: ucm: implement boot parameters and card group sync infrastructure

Implement boot parameter management for multi-card synchronization.

Add boot_params.c with read/write functions for Boot control element,
card group configuration file support, and validity checking.
Extend init_ucm.c with boot/restore logic and card state handling.

Add -G (group-file) and -m (force-ucm-restore) command line options.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>