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/logicpd/am3517evm/am3517evm.c b/board/logicpd/am3517evm/am3517evm.c
index 5d2d997..c18a5a3 100644
--- a/board/logicpd/am3517evm/am3517evm.c
+++ b/board/logicpd/am3517evm/am3517evm.c
@@ -105,7 +105,7 @@
 	volatile unsigned int ctr;
 	u32 reset;
 
-#ifdef CONFIG_SYS_I2C_OMAP34XX
+#ifdef CONFIG_SYS_I2C_OMAP24XX
 	i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
 #endif