Revert "mb/google/rex: Enable sending EOP from payload"

This reverts commit 55b7dee2784e9fe80870c6c33ba91b98021df8b5.

Reason for revert: accidentally submitted out of order / breaks tree

Change-Id: Ic15d0e3688cd54f7d678998341263e7bd30e75f2
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78525
Tested-by: Martin L Roth <gaumless@gmail.com>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
diff --git a/src/mainboard/google/rex/Kconfig b/src/mainboard/google/rex/Kconfig
index 0189650..8be8b6f 100644
--- a/src/mainboard/google/rex/Kconfig
+++ b/src/mainboard/google/rex/Kconfig
@@ -28,7 +28,7 @@
 	select SOC_INTEL_COMMON_BLOCK_VARIANT_POWER_LIMIT
 	select SOC_INTEL_CSE_LITE_SKU
 	select SOC_INTEL_CSE_PRE_CPU_RESET_TELEMETRY_V2
-	select SOC_INTEL_CSE_SEND_EOP_BY_PAYLOAD
+	select SOC_INTEL_CSE_SEND_EOP_ASYNC
 
 config BOARD_GOOGLE_BASEBOARD_REX
 	def_bool n