Configs: Migrate CONFIG_SYS_I2C_OMAP34XX to CONFIG_SYS_I2C_OMAP24XX

The driver is for all boards 24XX and up, so let's eliminate the
extra option called CONFIG_SYS_I2C_OMAP34XX since the driver checks
for CONFIG_OMAP34XX we don't need CONFIG_SYS_I2C_OMAP34XX.

Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/board/ti/am3517crane/am3517crane.c b/board/ti/am3517crane/am3517crane.c
index 5fa319d..136cc43 100644
--- a/board/ti/am3517crane/am3517crane.c
+++ b/board/ti/am3517crane/am3517crane.c
@@ -43,7 +43,7 @@
  */
 int misc_init_r(void)
 {
-#ifdef CONFIG_SYS_I2C_OMAP34XX
+#ifdef CONFIG_SYS_I2C_OMAP24XX
 	i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
 #endif