hwmon: (sis5595) Fix checkpatch issues

Fixed:
ERROR: do not use assignment in if condition
ERROR: space prohibited after that open parenthesis '('
ERROR: space prohibited before that close parenthesis ')'
ERROR: space required after that ',' (ctx:VxV)
ERROR: spaces required around that '<' (ctx:VxV)
ERROR: spaces required around that '==' (ctx:VxV)
ERROR: trailing statements should be on next line
ERROR: trailing whitespace
ERROR: Macros with multiple statements should be enclosed in a do - while loop
WARNING: line over 80 characters
WARNING: please, no space before tabs
WARNING: please, no spaces at the start of a line
WARNING: simple_strtol is obsolete, use kstrtol instead
WARNING: simple_strtoul is obsolete, use kstrtoul instead

Modify multi-line comments to follow Documentation/CodingStyle.

Cc: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>