pflash: bump version to v5.9

Change-Id: I76cd275eccd2ae7f076572a197a1aa6250083b5c
Signed-off-by: Joel Stanley <joel@jms.id.au>
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 bb8e058..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 = "da6ff8b098765434f21880e81ed4e324dacd0f49"
-PV = "v5.7-rc2"
+SRCREV = "e0ee24c27a172bcf482f6f2bc905e6211c134bcc"
+PV = "v5.9"
 
 S = "${WORKDIR}/git"