amd/stoneyridge: Enable BERT table generation

Add a duplicate ACPI_BERT symbol with a 'y' default setting and additional
help text.

BUG=b:65446699
TEST=inspect BERT region, and dmesg, on full patch stack.  Use test
     data plus a failing Grunt system.

Change-Id: I817111cbd3e81b93d8b02d0654ba68c8678b1bbe
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/28479
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marc Jones <marc@marcjonesconsulting.com>

src/soc/amd/stoneyridge/Kconfig

@@ -290,6 +290,15 @@ config ACPI_CPU_STRING
 	string
 	default "\\_PR.P%03d"
 
+config ACPI_BERT
+	bool "Build ACPI BERT Table"
+	default y
+	depends on HAVE_ACPI_TABLES
+	help
+	  Report Machine Check errors identified in POST to the OS in an
+	  ACPI Boot Error Record Table.  This option reserves an 8MB region
+	  for building the error structures.
+
 config USE_PSPSCUREOS
 	bool "Include PSP SecureOS blobs in AMD firmware"
 	default y