mb/google/variant/voema: Select USE_CAR_NEM_ENHANCED_V2 for voema

BUG=b:171755775
TEST=FW_NAME=voema emerge-volteer coreboot chromeos-bootimage

Signed-off-by: David Wu <david_wu@quanta.corp-partner.google.com>
Change-Id: Ibedbbe8f9ac039cbde114ace3266ec067a4003ba
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47159
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/mainboard/google/volteer/Kconfig.name

@@ -86,3 +86,4 @@ config BOARD_GOOGLE_ELEMI
 config BOARD_GOOGLE_VOEMA
 	bool "-> Voema"
 	select BOARD_GOOGLE_BASEBOARD_VOLTEER
+	select USE_CAR_NEM_ENHANCED_V2