e1000e: Cleanup return values in ethtool

Changing occurrences of returning 0 and 1 from bool functions to false and
true, respectively

Signed-off-by: Dave Ertman <davidx.m.ertman@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/e1000e/ethtool.c b/drivers/net/ethernet/intel/e1000e/ethtool.c
index cad250b..2204a9c 100644
--- a/drivers/net/ethernet/intel/e1000e/ethtool.c
+++ b/drivers/net/ethernet/intel/e1000e/ethtool.c
@@ -783,10 +783,10 @@
 			      reg + (offset << 2), val,
 			      (test[pat] & write & mask));
 			*data = reg;
-			return 1;
+			return true;
 		}
 	}
-	return 0;
+	return false;
 }
 
 static bool reg_set_and_check(struct e1000_adapter *adapter, u64 *data,
@@ -799,9 +799,9 @@
 		e_err("set/check test failed (reg 0x%05X): got 0x%08X expected 0x%08X\n",
 		      reg, (val & mask), (write & mask));
 		*data = reg;
-		return 1;
+		return true;
 	}
-	return 0;
+	return false;
 }
 
 #define REG_PATTERN_TEST_ARRAY(reg, offset, mask, write)                       \