cros: Disable coreboot related BL31 features

I don't know why, but removing this BL31 make argument lets gru-kevin
power off properly when shut down from Linux. Needs investigation.
Do it as a cros-only HACK patch so people don't have to hold the power
button after every shutdown.

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>

resources/coreboot/cros/patches/0003-HACK-Disable-coreboot-related-BL31-features.patch

@@ -0,0 +1,28 @@
+From 9f52555eac217623ad2edc72492f9ded6a5b538d Mon Sep 17 00:00:00 2001
+From: Alper Nebi Yasak <alpernebiyasak@gmail.com>
+Date: Thu, 22 Jun 2023 16:44:27 +0300
+Subject: [PATCH] HACK: Disable coreboot related BL31 features
+
+I don't know why, but removing this BL31 make argument lets gru-kevin
+power off properly when shut down from Linux. Needs investigation.
+---
+ src/arch/arm64/Makefile.inc | 3 ---
+ 1 file changed, 3 deletions(-)
+
+diff --git a/src/arch/arm64/Makefile.inc b/src/arch/arm64/Makefile.inc
+index 6b49743633c3..e1982d92cc5c 100644
+--- a/src/arch/arm64/Makefile.inc
++++ b/src/arch/arm64/Makefile.inc
+@@ -158,9 +158,6 @@ BL31_MAKEARGS += LOG_LEVEL=40
+ # Always enable crash reporting, even on a release build
+ BL31_MAKEARGS += CRASH_REPORTING=1
+ 
+-# Enable coreboot-specific features like CBMEM console support
+-BL31_MAKEARGS += COREBOOT=1
+-
+ # Avoid build/release|build/debug distinction by overriding BUILD_PLAT directly
+ BL31_MAKEARGS += BUILD_PLAT="$(BL31_BUILD)"
+ 
+-- 
+2.40.1
+