skiboot: bump to v5.7-rc2

Balbir Singh (1):
      numa/associativity: Add a new level of NUMA for GPU's

Benjamin Herrenschmidt (9):
      cpu: Unconditionally cleanup TLBs on P9 in opal_reinit_cpus()
      cpu: Better handle unknown flags in opal_reinit_cpus()
      xive: Properly get rid of donated indirect pages during reset
      xive: Enable memory backing of queues
      phb4: Print more info when PHB fences
      phb4: Verbose EEH options
      phb4: Add register access helpers
      phb4: Use new accessors in a few places
      phb4: Fix PHB4 fence recovery

Joel Stanley (1):
      lpc: remove double LPC prefix from messages

Mahesh Salgaonkar (2):
      Fix scom addresses for power9 core checkstop hmi handling.
      Fix scom addresses for power9 nx checkstop hmi handling.

Michael Neuling (11):
      hdata: Fix phb4 lane-eq property generation
      phb4: Set default lane equalisation
      phb4: Remove incorrect state transition
      phb4: Fix order of pfir/nfir clearing in CRESET
      phb4: Only set one bit in nfir
      pci: Print resetting PHB notice at higher log level
      pci: Add ability to trace timing
      phb4: Avoid recursive call into run state machine
      phb4: Workaround phy lockup by doing full PHB reset on retry
      phb4: Rework retries so we can do more than one
      phb4: Do more retries on link training failures

Stewart Smith (12):
      hw/fsi-master: check zalloc return value
      hdata/vpd: Don't dereference possible NULL model_name
      doc/device-tree: improve root node doc
      hw/occ: explicitly document fallthrough
      hw/occ: remove dead code
      core/mem_region: check return value of add_region
      xz: add fallthrough annotations to silence GCC7 warning
      travis: add fedora26
      test/qemu-jessie: dump boot log on failure
      test/qemu-jessie: bail out fast on kernel panic
      opal-ci/fetch-debian-jessie-installer: follow redirects
      doc: skiboot-5.7-rc2 release notes

Vasant Hegde (2):
      IPMI: Move MAX_IPMI_SENSORS macro to ipmi.h
      HDAT: Add IPMI sensor data under /bmc node

Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
diff --git a/openpower/package/skiboot/Config.in b/openpower/package/skiboot/Config.in
index ddff494..e357370 100644
--- a/openpower/package/skiboot/Config.in
+++ b/openpower/package/skiboot/Config.in
@@ -31,7 +31,7 @@
 
 config BR2_SKIBOOT_VERSION
 	string
-	default "v5.7-rc1" if BR2_SKIBOOT_LATEST_VERSION
+	default "v5.7-rc2" if BR2_SKIBOOT_LATEST_VERSION
 	default BR2_SKIBOOT_CUSTOM_VERSION_VALUE \
 		if BR2_SKIBOOT_CUSTOM_VERSION