i2c: i2c-s3c2410: Add a cpu_relax() to busy wait for bus idle

Be a bit more friendly.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

drivers/i2c/busses/i2c-s3c2410.c

diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
index 2754cef8..37b2de1 100644
--- a/drivers/i2c/busses/i2c-s3c2410.c
+++ b/drivers/i2c/busses/i2c-s3c2410.c
@@ -534,6 +534,7 @@
 
 	/* first, try busy waiting briefly */
 	do {
+		cpu_relax();
 		iicstat = readl(i2c->regs + S3C2410_IICSTAT);
 	} while ((iicstat & S3C2410_IICSTAT_START) && --spins);