README: I2C: Fix indent

Signed-off-by: NNobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>

README

@@ -1994,9 +1994,9 @@ CBFS (Coreboot Filesystem) support
 		    second bus.
 
 		- drivers/i2c/tegra_i2c.c:
-		 - activate this driver with CONFIG_SYS_I2C_TEGRA
-		 - This driver adds 4 i2c buses with a fix speed from
-		   100000 and the slave addr 0!
+		  - activate this driver with CONFIG_SYS_I2C_TEGRA
+		  - This driver adds 4 i2c buses with a fix speed from
+		    100000 and the slave addr 0!
 
 		- drivers/i2c/ppc4xx_i2c.c
 		  - activate this driver with CONFIG_SYS_I2C_PPC4XX