minor fixes (formatting, comments, unused includes etc.)

minor fixes (formatting, comments, unused includes etc.)

Minor fixes:
 - remove some empty lines
 - remove some unused includes
 - multi-line comment fixes
 - 80-columns formatting fixes

Signed-off-by: Corneliu ZUZU <czuzu@bitdefender.com>
Acked-by: Razvan Cojocaru <rcojocaru@bitdefender.com>
Acked-by: Julien Grall <julien.grall@arm.com>
Acked-by: Jan Beulich <jbeulich@suse.com>