Revert "pflash: bump version to v5.9.4"

This reverts commit 9786fd849e89c62c60d5a9a219ab3a472f4a6595.
Bumping skiboot to v5.9.4 introduced intermittent CI compile
fails.

open-power/skiboot#143

Change-Id: I2c75de877034036cb1552e2f5388a95ebe24eba0
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-openbmc-machines/meta-openpower/common/recipes-bsp/skiboot/skiboot.inc b/meta-openbmc-machines/meta-openpower/common/recipes-bsp/skiboot/skiboot.inc
index 01a2461..ea4adb9 100644
--- a/meta-openbmc-machines/meta-openpower/common/recipes-bsp/skiboot/skiboot.inc
+++ b/meta-openbmc-machines/meta-openpower/common/recipes-bsp/skiboot/skiboot.inc
@@ -8,8 +8,8 @@
 
 LIC_FILES_CHKSUM = "file://${S}/LICENCE;md5=3b83ef96387f14655fc854ddc3c6bd57"
 
-SRCREV = "1a1a2bd43829dc49c63fda07c569fbfcb73353a5"
-PV = "v5.9.4"
+SRCREV = "e0ee24c27a172bcf482f6f2bc905e6211c134bcc"
+PV = "v5.9"
 
 S = "${WORKDIR}/git"