power: supply: sc27xx: Delete superfluous error message

In the function sc27xx_fgu_probe(), when get irq failed,
platform_get_irq() logs an error message, so remove
redundant message here.

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