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/arch/arm/mach-omap2/omap3/clock.c b/arch/arm/mach-omap2/omap3/clock.c
index 006969e..3daae61 100644
--- a/arch/arm/mach-omap2/omap3/clock.c
+++ b/arch/arm/mach-omap2/omap3/clock.c
@@ -772,7 +772,7 @@
 	setbits_le32(&prcm_base->iclken_per, 0x00020000);
 #endif
 
-#ifdef CONFIG_SYS_I2C_OMAP34XX
+#ifdef CONFIG_SYS_I2C_OMAP24XX
 	/* Turn on all 3 I2C clocks */
 	setbits_le32(&prcm_base->fclken1_core, 0x00038000);
 	setbits_le32(&prcm_base->iclken1_core, 0x00038000); /* I2C1,2,3 = on */