skiboot: bump to v6.1

This bumps skiboot to the latest release.

Tested: Built on a Witherspoon
Change-Id: I7fc9d0f3e236fd6734617ddd86e27ed06ba2770b
Signed-off-by: Gunnar Mills <gmills@us.ibm.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 e4a275a..169b207 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
@@ -7,8 +7,8 @@
 
 LIC_FILES_CHKSUM = "file://${S}/LICENCE;md5=3b83ef96387f14655fc854ddc3c6bd57"
 
-SRCREV = "c55a54bbf38b6b3144105885e173ae7b6afab091"
-PV = "v6.0.4"
+SRCREV = "452998f4be5973d8884e3db5aa362bf40e11467a"
+PV = "v6.1"
 
 S = "${WORKDIR}/git"