e1000e: fix trivial kernel doc typos

The macro E1000_success is meant to be E1000_SUCCESS. As the return
statement in the function is good as is, let's simply correct the
comment for this trivial matter.

Additionally E1000_ERR_HOST_INTERFACE_COMMAND is supposed to be
-E1000_ERR_HOST_INTERFACE_COMMAND.

Signed-off-by: Jean Sacren <[e-mail]>
Tested-by: Aaron Brown <[e-mail]>
Signed-off-by: Jeff Kirsher <[e-mail]>

drivers/net/ethernet/intel/e1000e/manage.c

···
  *  e1000_mng_enable_host_if - Checks host interface is enabled
  *  @hw: pointer to the HW structure
  *
- *  Returns E1000_success upon success, else E1000_ERR_HOST_INTERFACE_COMMAND
+ *  Returns 0 upon success, else -E1000_ERR_HOST_INTERFACE_COMMAND
  *
  *  This function checks whether the HOST IF is enabled for command operation
  *  and also checks whether the previous command is completed.  It busy waits