[patch] regulator: lp3972: Silence uninitialized variable warning

[Dan Carpenter]

This is harmless but my static checker complains that "tmp" is
uninitialized if lp3972_i2c_read() fails.  I have moved the line of code
below the error handling to silence the warning.

Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/drivers/regulator/lp3972.c b/drivers/regulator/lp3972.c
index 3a7e96e..ff0c275 100644
--- a/drivers/regulator/lp3972.c
+++ b/drivers/regulator/lp3972.c
@@ -211,8 +211,8 @@ static int lp3972_set_bits(struct lp3972 *lp3972, u8 reg, 
u16 mask, u16 val)
        mutex_lock(&lp3972->io_lock);
 
        ret = lp3972_i2c_read(lp3972->i2c, reg, 1, &tmp);
-       tmp = (tmp & ~mask) | val;
        if (ret == 0) {
+               tmp = (tmp & ~mask) | val;
                ret = lp3972_i2c_write(lp3972->i2c, reg, 1, &tmp);
                dev_dbg(lp3972->dev, "reg write 0x%02x -> 0x%02x\n", (int)reg,
                        (unsigned)val & 0xff);