The majority of the e1000e code checks most function return values using a
test like 'if (ret_val)' or 'if (!ret_val)' but there are a few instances
of 'if (ret_val == 0)'.  This patch converts the latter to the former for
consistency.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
                ret_val = e1000_read_nvm(hw, first_word, 1, &eeprom_buff[0]);
                ptr++;
        }
-       if (((eeprom->offset + eeprom->len) & 1) && (ret_val == 0))
+       if (((eeprom->offset + eeprom->len) & 1) && (!ret_val))
                /* need read/modify/write of last changed EEPROM word */
                /* only the first byte of the word is being modified */
                ret_val = e1000_read_nvm(hw, last_word, 1,
 
                        }
                        udelay(1);
                }
-               if (ret_val == 0) {
+               if (!ret_val) {
                        /*
                         * Successful in waiting for previous cycle to timeout,
                         * now set the Flash Cycle Done.
                udelay(1);
                /* Steps */
                ret_val = e1000_flash_cycle_init_ich8lan(hw);
-               if (ret_val != 0)
+               if (ret_val)
                        break;
 
                hsflctl.regval = er16flash(ICH_FLASH_HSFCTL);
                 * read in (shift in) the Flash Data0, the order is
                 * least significant byte first msb to lsb
                 */
-               if (ret_val == 0) {
+               if (!ret_val) {
                        flash_data = er32flash(ICH_FLASH_FDATA0);
                        if (size == 1)
                                *data = (u8)(flash_data & 0x000000FF);
 
                        ret_val = e1000_flash_cycle_ich8lan(hw,
                                               ICH_FLASH_ERASE_COMMAND_TIMEOUT);
-                       if (ret_val == 0)
+                       if (!ret_val)
                                break;
 
                        /*