src/drivers: Drop unneeded empty lines

Change-Id: I202e5d285612b9bf237b588ea3c006187623fdc3
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44609
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>

src/drivers/i2c/designware/dw_i2c.c

@@ -698,7 +698,6 @@ static int dw_i2c_set_speed(unsigned int bus, enum i2c_speed speed,
 	return 0;
 }
 
-
 /*
  * Initialize this bus controller and set the speed.
  *