cpu: Remove BOARD_MICROCODE_CBFS_GENERATE Kconfig option

Commit * bdafcfa Add the Intel FSP 206ax CPU core support
Introduced this option. This option was meant to have a board generate
a CBFS file containing microcode. However, microcode generation used to be
enabled by default when CPU_MICROCODE_IN_CBFS was selected.

The introduction of BOARD_MICROCODE_CBFS_GENERATE killed that automatic
default, which is not what we want. This option is misguided in the sense
that it tends to introduce a non-default which had been intentionally a
default. We now have to select two Kconfig options in order to generate
microcode in CBFS, meaning one option is redundant.

Change-Id: I3034833df1a9afa7d6d9d537484cb4ac89d30183
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/4478
Tested-by: build bot (Jenkins)

src/cpu/intel/fsp_model_206ax/Kconfig

@@ -33,7 +33,6 @@ config CPU_SPECIFIC_OPTIONS
 	select UDELAY_LAPIC
 	select SMM_TSEG
 	select CPU_MICROCODE_IN_CBFS if HAVE_FSP_BIN
-	select BOARD_MICROCODE_CBFS_GENERATE
 	select TSC_SYNC_MFENCE
 
 config BOOTBLOCK_CPU_INIT