Revert HCODE back to hw040319a.940

The HCODE updates break booting without disabling stop4/stop5.

This should never have been merged as it solidly breaks booting,
even the simple test of "boot to petitboot and exit to shell".

The CI system had stop4/stop5 disabled via NVRAM.

This partially reverts commit 3c6b318e43ffdf552351b99a19e6c78f6ac0c366
and 5731c281fb8f8e5a20177d19bd3a503c50bc5748.

Fixes: 3c6b318e43ffdf552351b99a19e6c78f6ac0c366
Fixes: 5731c281fb8f8e5a20177d19bd3a503c50bc5748
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
diff --git a/openpower/package/hcode/Config.in b/openpower/package/hcode/Config.in
index 7151087..dc37c13 100644
--- a/openpower/package/hcode/Config.in
+++ b/openpower/package/hcode/Config.in
@@ -31,7 +31,7 @@
 
 config BR2_HCODE_VERSION
 	string
-	default "hw043019a.940" if BR2_HCODE_LATEST_VERSION
+	default "hw040319a.940" if BR2_HCODE_LATEST_VERSION
 	default BR2_HCODE_CUSTOM_VERSION_VALUE \
 		if BR2_HCODE_CUSTOM_VERSION