ec/google/chromec: Add BFIV, BFCT

The flag EC_BATT_FLAG_CUT_OFF was added with the CL:
3704470: battery: Set battery cutoff flag
https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3704470

This flag is set in the ACPI memory mapped area when the command
`ectool batterycutoff` is issued so ACPI code can respond
appriopriately. This CL adds the flags to coreboot ACPI.

BRANCH=none
BUG=b:217911928
TEST=Boot nipperkin with low & no battery
TEST=Boot skyrim with low & no battery

Signed-off-by: Tim Van Patten <timvp@google.com>
Change-Id: I4e63ff4fc2d6b0ecf767a6bffd81f823c74c15bb
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66803
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/ec/google/chromeec/acpi/emem.asl b/src/ec/google/chromeec/acpi/emem.asl
index 613d027..3eec35ea 100644
--- a/src/ec/google/chromeec/acpi/emem.asl
+++ b/src/ec/google/chromeec/acpi/emem.asl
@@ -33,6 +33,8 @@
 BFDC, 1,	// Battery Discharging
 BFCG, 1,	// Battery Charging
 BFCR, 1,	// Battery Level Critical
+BFIV, 1,	// Invalid Battery Data
+BFCT, 1,	// Battery cutoff
 Offset (0x4d),
 BTCN, 8,	// Battery Count
 BTIX, 8,	// Battery index