hwmon: (w83792d) Fix checkpatch issues

Fixed:
ERROR: code indent should use tabs where possible
ERROR: do not use assignment in if condition
ERROR: space prohibited after that open parenthesis '('
ERROR: space required after that ',' (ctx:VxV)
ERROR: space required after that ',' (ctx:WxV)
ERROR: spaces required around that ':' (ctx:VxE)
ERROR: spaces required around that '<=' (ctx:VxV)
ERROR: spaces required around that '<' (ctx:VxV)
ERROR: spaces required around that '==' (ctx:VxV)
ERROR: spaces required around that '=' (ctx:VxV)
ERROR: spaces required around that '||' (ctx:VxV)
ERROR: spaces required around that ':' (ctx:VxV)
ERROR: spaces required around that '?' (ctx:VxV)
WARNING: braces {} are not necessary for any arm of this statement
WARNING: braces {} are not necessary for single statement blocks
WARNING: line over 80 characters
WARNING: simple_strtol is obsolete, use kstrtol instead
WARNING: simple_strtoul is obsolete, use kstrtoul instead
WARNING: space prohibited between function name and open parenthesis '('

Modify multi-line comments to follow Documentation/CodingStyle.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>