Clean up several comments in file r8192U_dm.c

Changes in v3:
 - Split patch 3 in two patches, one for '*' on subsequent lines and one
   for '*/' on separate line, as suggested by Dan.
 - Add spaces after '*' in patch 3 

Changes in v2:
 - Remove the 'commented code' and 'revision history' before
   reformatting the block comments, as suggested by Greg. There is no use
   in fixing comments, only to remove them in the next commits 
 - Patch 1: Changed the description and removed extra blank lines under
   the change history
 - Patch 2: Changed the subject and description 

This patchset was created after reviewer feedback on an initial patch.
The feedback suggested additional cleanup comments. Link to the first
patch:
https://lore.kernel.org/outreachy/ZB2a5zwYpBZ%2F6qwU@khadija-virtual-machine/

Khadija Kamran (4):
  staging: rtl8192u: remove change history from comments
  staging: rtl8192u: remove commented out code
  staging: rtl8192u: add '*' on subsequent lines in block comment
  staging: rtl8192u: add '*/' on separate line in block comments

 drivers/staging/rtl8192u/r8192U_dm.c | 206 +++------------------------
 1 file changed, 23 insertions(+), 183 deletions(-)

-- 
2.34.1