rtc: bq32k: remove redundant check

removing below static analysis error:
(error) Possible null pointer dereference: client

if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
							^^^^^^^
Error comes because client is dereferenced before NULL check.
So probably NULL this check is not required.

Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
diff --git a/drivers/rtc/rtc-bq32k.c b/drivers/rtc/rtc-bq32k.c
index 92679df..409de9f 100644
--- a/drivers/rtc/rtc-bq32k.c
+++ b/drivers/rtc/rtc-bq32k.c
@@ -212,7 +212,7 @@
 	if (error)
 		return error;
 
-	if (client && client->dev.of_node)
+	if (client->dev.of_node)
 		trickle_charger_of_init(dev, client->dev.of_node);
 
 	rtc = devm_rtc_device_register(&client->dev, bq32k_driver.driver.name,