intel/fsp_broadwell_de: Enable CONSOLE_CBMEM by default

In the very early days of FSP 1.0 this did not work so
we kept it disabled.

Change-Id: I8a88be6df335598d4c6007a8b7ff307b293e1f97
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35284
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/soc/intel/fsp_broadwell_de/Kconfig

@@ -77,10 +77,6 @@ config INTEGRATED_UART
 	help
 	  Use Broadwell-DE Integrated UART ports @3F8h and 2F8h.
 
-config CONSOLE_CBMEM
-	bool "Send console output to a CBMEM buffer"
-	default n
-
 config SERIRQ_CONTINUOUS_MODE
 	bool
 	default n