Name
driver_find — 
     locate driver on a bus by its name.
 
Arguments
- name
- 
     name of the driver.
     
- bus
- 
     bus to scan for the driver.
     
Description
   Call kset_find_obj to iterate over list of drivers on
   a bus to find driver by name. Return driver if found.
   
   This routine provides no locking to prevent the driver it returns
   from being unregistered or unloaded while the caller is using it.
   The caller is responsible for preventing this.