power: supply: qcom_smbb: Remove superfluous error message

In the probe function, when get irq failed, the function
platform_get_irq_byname() logs an error message, so remove
redundant message here.

Co-developed-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>