Revert "Update to v5.18 kernel headers."

Revert "Update to v5.18 kernel headers."

Revert submission 2106847-kernel_update

Reason for revert: b/234125620
Reverted Changes:
I5844ca1fc:Update to v5.18 kernel headers.
I5700813ee:Update to v5.18 kernel headers.
Bug: 234125620

Change-Id: I07a39aa9c01939455b5a2a9da5fc04be497ca399
diff --git a/libc/kernel/uapi/sound/sof/abi.h b/libc/kernel/uapi/sound/sof/abi.h
index 810a0b4..3af3c9d 100644
--- a/libc/kernel/uapi/sound/sof/abi.h
+++ b/libc/kernel/uapi/sound/sof/abi.h
@@ -19,8 +19,8 @@
 #ifndef __INCLUDE_UAPI_SOUND_SOF_ABI_H__
 #define __INCLUDE_UAPI_SOUND_SOF_ABI_H__
 #define SOF_ABI_MAJOR 3
-#define SOF_ABI_MINOR 19
-#define SOF_ABI_PATCH 1
+#define SOF_ABI_MINOR 18
+#define SOF_ABI_PATCH 0
 #define SOF_ABI_MAJOR_SHIFT 24
 #define SOF_ABI_MAJOR_MASK 0xff
 #define SOF_ABI_MINOR_SHIFT 12