doc: ti: Add switch setting for boot modes on AM62 SK

List some common boot modes and their corresponding switch
settings for AM62 SK.

Signed-off-by: Judith Mendez <jm@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
1 file changed