regulator: tps6524x: Fix broken use of spi_dev_get()

The tps6524x driver uses spi_dev_get() to take a copy of the SPI device
it uses but has no obvious reason to do so and never calls spi_dev_put()
to release the reference.  Fix this to just a straight copy.

Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/regulator/tps6524x-regulator.c b/drivers/regulator/tps6524x-regulator.c
index 9d6ea3a..67cac26 100644
--- a/drivers/regulator/tps6524x-regulator.c
+++ b/drivers/regulator/tps6524x-regulator.c
@@ -600,7 +600,7 @@
 
 	memset(hw, 0, sizeof(struct tps6524x));
 	hw->dev = dev;
-	hw->spi = spi_dev_get(spi);
+	hw->spi = spi;
 	mutex_init(&hw->lock);
 
 	for (i = 0; i < N_REGULATORS; i++, info++, init_data++) {