mainboard/intel/icelake_rvp: Add support to read board ID from EC

This patch selects EC_ACPI kconfig to identify Intel Ice Lake
RVP board by querying EC.

Change-Id: I0082e04ef1b21d533e40d232209ee630f748aec6
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32523
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>

src/mainboard/intel/icelake_rvp/Kconfig

@@ -3,6 +3,7 @@ if BOARD_INTEL_ICELAKE_RVPU || BOARD_INTEL_ICELAKE_RVPY
 config BOARD_SPECIFIC_OPTIONS
 	def_bool y
 	select BOARD_ROMSIZE_KB_16384
+	select EC_ACPI
 	select GENERIC_SPD_BIN
 	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES