google/fizz: enable SPD read by word

This is to enable SPD word access to reduce boot time. It can save
80 ~ 100 ms per DIMM.

BUG=b:67021853
BRANCH=None
TEST=system boot, and boot time is reduced

Change-Id: Ic527a539ed634e15b939b18fff4b4e08ebb3ec57
Signed-off-by: Kane Chen <kane.chen@intel.com>
Reviewed-on: https://review.coreboot.org/22267
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/google/fizz/Kconfig

@@ -18,6 +18,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select FIZZ_USE_SPI_TPM
 	select GENERIC_SPD_BIN
 	select RT8168_GET_MAC_FROM_VPD
+	select SPD_READ_BY_WORD
 
 config VBOOT
 	select EC_GOOGLE_CHROMEEC_SWITCHES