tegra: Cleanup I2C support

Remove the irrelevant section from the README and remove the
non-functional SPL-undef section.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/README b/README
index b7e2c87..fea0d3c 100644
--- a/README
+++ b/README
@@ -1462,11 +1462,6 @@
 		with a list of GPIO LEDs that have inverted polarity.
 
 - I2C Support:
-		- 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!
-
 		- drivers/i2c/ppc4xx_i2c.c
 		  - activate this driver with CONFIG_SYS_I2C_PPC4XX
 		  - CONFIG_SYS_I2C_PPC4XX_CH0 activate hardware channel 0
diff --git a/include/configs/tegra-common-post.h b/include/configs/tegra-common-post.h
index dd7a75a..69adf64 100644
--- a/include/configs/tegra-common-post.h
+++ b/include/configs/tegra-common-post.h
@@ -113,11 +113,6 @@
 
 #define CONFIG_SKIP_LOWLEVEL_INIT_ONLY
 
-/* remove I2C support */
-#ifdef CONFIG_SYS_I2C_TEGRA
-#undef CONFIG_SYS_I2C_TEGRA
-#endif
-
 /* remove USB */
 #ifdef CONFIG_USB_EHCI_TEGRA
 #undef CONFIG_USB_EHCI_TEGRA