board/BuR/common: Add CONFIG_CMD_I2C

in almost all cases we need the i2c commands within the u-boot shell.
So we enable them within the common section.

Cc: trini@ti.com
Signed-off-by: Hannes Petermaier <oe5hpm@oevsv.at>

include/configs/bur_am335x_common.h

@@ -96,7 +96,7 @@
 #define CONFIG_SYS_OMAP24_I2C_SPEED	100000
 #define CONFIG_SYS_OMAP24_I2C_SLAVE	1
 #define CONFIG_SYS_I2C_OMAP24XX
-
+#define CONFIG_CMD_I2C
 /* GPIO */
 #define CONFIG_OMAP_GPIO
 #define CONFIG_CMD_GPIO