[PATCH] abituguru: Review fixes

Fixes to the Abit uGuru driver as requested in review by Jean Delvare:
 - exactly calculate the sysfs_names array length using macro
 - use snprintf when generating names to double check that the sysfs_names
   array does not overflow.
 - use ARRAY_SIZE and / or defines to determine number of loops in for loops
   instead of using hardcoded values.
 - In abituguru_probe(), refactor the error path leaving a single call to kfree

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>