mb/prodrive/atlas: Disable SaGv by default

Customer needs SaGv to be disabled by default.

Signed-off-by: Lean Sheng Tan <sheng.tan@9elements.com>
Change-Id: I8454c267dcc12d2ef7de7bd23296a17294f058a0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72384
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Maximilian Brune <maximilian.brune@9elements.com>
diff --git a/src/mainboard/prodrive/atlas/Kconfig b/src/mainboard/prodrive/atlas/Kconfig
index 3900f4d..eda23cb 100644
--- a/src/mainboard/prodrive/atlas/Kconfig
+++ b/src/mainboard/prodrive/atlas/Kconfig
@@ -17,7 +17,7 @@
 
 config ATLAS_ENABLE_SAGV
 	bool "Enable SaGv"
-	default y
+	default n
 
 config ATLAS_ENABLE_IBECC
 	bool "Enable IBECC"