am335x: Update the config vars selected by CPU_TI_AM335X.

The way those variables work has changed twice since this file was last
changed, and console output was no longer working. Now that they're up to
date there's serial output from beaglebone again.

Change-Id: I5167fd8c0a8c33438d7f056fdf5951bd054010ed
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3923
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/cpu/ti/Kconfig

@@ -2,7 +2,8 @@ config CPU_TI_AM335X
 	depends on ARCH_ARMV7
 	select HAVE_MONOTONIC_TIMER
 	select HAVE_UART_SPECIAL
-	select DEFAULT_EARLY_CONSOLE
+	select BOOTBLOCK_CONSOLE
+	select EARLY_CONSOLE
 	bool
 	default n