radeonfb: speed up the I2C buses

There is no reason to drive the radeon I2C buses at such a low speed, so bump
it from 12.5 kbps to 50 kbps.  The Intel (i810) and Matrox framebuffer drivers
already run their I2C bus at this speed.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/video/aty/radeon_i2c.c

@@ -78,7 +78,7 @@ static int radeon_setup_i2c_bus(struct radeon_i2c_chan *chan, const char *name)
 	chan->algo.setscl		= radeon_gpio_setscl;
 	chan->algo.getsda		= radeon_gpio_getsda;
 	chan->algo.getscl		= radeon_gpio_getscl;
-	chan->algo.udelay		= 40;
+	chan->algo.udelay		= 10;
 	chan->algo.timeout		= 20;
 	chan->algo.data 		= chan;