Kconfig: Drop the C_ENVIRONMENT_BOOTBLOCK symbol

The romcc bootblock will be deprecated soon and most platforms use
C_ENVIRONMENT_BOOTBLOCK already. This patch drops the
CONFIG_C_ENVIRONMENT_BOOTBLOCK symbol and adds CONFIG_ROMCC_BOOTBLOCK
where needed.

Change-Id: I773a76aade623303b7cd95ebe9b0411e5a7ecbaf
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37154
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Michał Żygowski <michal.zygowski@3mdeb.com>
diff --git a/src/soc/intel/baytrail/Kconfig b/src/soc/intel/baytrail/Kconfig
index 397e867..fac14cb 100644
--- a/src/soc/intel/baytrail/Kconfig
+++ b/src/soc/intel/baytrail/Kconfig
@@ -37,6 +37,7 @@
 	select INTEL_GMA_SWSMISCI
 	select CPU_INTEL_COMMON
 	select CPU_HAS_L2_ENABLE_MSR
+	select ROMCC_BOOTBLOCK
 
 config VBOOT
 	select VBOOT_MUST_REQUEST_DISPLAY