i2c: testunit: sort case blocks

Because a 'fallthrough' was refactored away, the order of 'case'
statements can be sorted better now to ease understanding the flow of
events.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

drivers/i2c/i2c-slave-testunit.c

@@ -94,6 +94,14 @@ static int i2c_slave_testunit_slave_cb(struct i2c_client *client,
 	int ret = 0;
 
 	switch (event) {
+	case I2C_SLAVE_WRITE_REQUESTED:
+		if (test_bit(TU_FLAG_IN_PROCESS, &tu->flags))
+			return -EBUSY;
+
+		memset(tu->regs, 0, TU_NUM_REGS);
+		tu->reg_idx = 0;
+		break;
+
 	case I2C_SLAVE_WRITE_RECEIVED:
 		if (test_bit(TU_FLAG_IN_PROCESS, &tu->flags))
 			return -EBUSY;
@@ -127,14 +135,6 @@ static int i2c_slave_testunit_slave_cb(struct i2c_client *client,
 		tu->reg_idx = 0;
 		break;
 
-	case I2C_SLAVE_WRITE_REQUESTED:
-		if (test_bit(TU_FLAG_IN_PROCESS, &tu->flags))
-			return -EBUSY;
-
-		memset(tu->regs, 0, TU_NUM_REGS);
-		tu->reg_idx = 0;
-		break;
-
 	case I2C_SLAVE_READ_PROCESSED:
 		if (is_proc_call && tu->regs[TU_REG_DATAH])
 			tu->regs[TU_REG_DATAH]--;