rivafb: Fix I2C getscl callback function

Fix rivafb's I2C getscl callback function, as was done in nvidiafb recently.

Signed-off-by: Jean Delvare <[e-mail]>
Signed-off-by: Antonino Daplas <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/video/riva/rivafb-i2c.c

···
 	if (VGA_RD08(par->riva.PCIO, 0x3d5) & 0x04)
 		val = 1;
 
-	val = VGA_RD08(par->riva.PCIO, 0x3d5);
-
 	return val;
 }