Bump skiboot-p10 to v6.6-268-gc80eab0d3

Additionally, move the skiboot version/repo to Config.in so that we just
need to change one file instead of multiple.

Changes since commit b81f146:

Cédric Le Goater (2):
      xive/p10: Use local_alloc() to allocate the XIVE bitmaps
      xive/p10: Fix lookup in END indirect table

Frederic Barrat (2):
      hw/phb5: Disable CAPI on P10
      hw/phb5: Update PHB numbering to allow for virtual PHBs

Madhavan Srinivasan (4):
      hw/imc: Fix the catalog subit for P10
      hw/imc: move imc_init() towards end main_cpu_entry()
      hw/imc: Disable only nest_imc devices if pause_microcode() fails
      hw/imc: update trace scom value for P10

Nicholas Piggin (1):
      P10 machine check handler

Ryan Grimm (2):
      BML ONLY phys/P10: Use topology index to get phys mapping
      hw/nx: Enable p10 DARN

Ryan P Grimm (9):
      Merge pull request #51 from npiggin/p10
      Merge pull request #55 from clegoater/for-p10
      Merge pull request #52 from svaidyan/multi-chip-fix
      Merge pull request #56 from masriniv/p10_master
      Merge pull request #53 from svaidyan/occ-p10
      Merge pull request #54 from hegdevasant/topology-fix
      Merge pull request #57 from frederic-barrat/nocapi
      Merge pull request #58 from clegoater/for-p10
      Merge pull request #59 from rgrimm/master

Vaidyanathan Srinivasan (2):
      cpu: Add retry in cpu_pm_disable to kick cpus out of idle
      occ: Enable defaults paths for P10

Vasant Hegde (1):
      hdat: Fix ibm,chip-id property

----------------------------------------------------------------
 core/cpu.c                                     |  13 +++++++++++--
 core/hmi.c                                     |   4 ++++
 core/init.c                                    |   6 +++---
 core/mce.c                                     | 117 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----------
 doc/opal-api/opal-pci-set-phb-capi-mode-93.rst |   5 +++--
 hdata/spira.c                                  |  18 +++++++++---------
 hw/capp.c                                      |  11 ++++-------
 hw/fsp/fsp-occ.c                               |   3 ++-
 hw/fsp/fsp.c                                   |   4 ++++
 hw/imc.c                                       |  47 ++++++++++++++++++++++++++++++++++++-----------
 hw/nx.c                                        |  21 ++++++++++++++-------
 hw/occ.c                                       |   2 +-
 hw/phb4.c                                      |  18 +++++++++++++++---
 hw/phys-map.c                                  |  18 ++++++++++++++++--
 hw/xive2.c                                     |  21 ++++++++++++---------
 include/phb4.h                                 |   2 +-
 include/phys-map.h                             |   3 +++
 17 files changed, 245 insertions(+), 68 deletions(-)

Signed-off-by: Klaus Heinrich Kiwi <klaus@linux.vnet.ibm.com>
diff --git a/openpower/package/skiboot/Config.in b/openpower/package/skiboot/Config.in
index 93d3a43..fe12a25 100644
--- a/openpower/package/skiboot/Config.in
+++ b/openpower/package/skiboot/Config.in
@@ -31,15 +31,17 @@
 
 config BR2_SKIBOOT_VERSION
 	string
-	default "v6.5-219-g53944d45" if BR2_SKIBOOT_LATEST_VERSION
+	default "v6.6-268-gc80eab0d3" if BR2_SKIBOOT_LATEST_VERSION
 	default BR2_SKIBOOT_CUSTOM_VERSION_VALUE \
 		if BR2_SKIBOOT_CUSTOM_VERSION
 
 config BR2_SKIBOOT_CUSTOM_GIT
 	bool "Custom git repository"
+	default y
 
 config BR2_SKIBOOT_CUSTOM_REPO_URL
 	string "URL of custom repository"
+	default "git@github.ibm.com:p10/skiboot.git"
 	depends on BR2_SKIBOOT_CUSTOM_GIT
 
 config BR2_SKIBOOT_DEVICETREE