Documentation/process: Make groups alphabetical and use tabs consistently

The list appears to be grouped by type (silicon, software, cloud) and
mostly alphabetical within each group, with a few exceptions.

Before adding to it, cleanup the list to be alphabetical within the
groups, and use tabs consistently throughout the list.

Signed-off-by: Darren Hart <darren@os.amperecomputing.com>
Link: https://lore.kernel.org/r/ec574b5d55584a3adda9bd31b7695193636ff136.1650995848.git.darren@os.amperecomputing.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>