Bump skiboot to skiboot-5.6.0-148-g6678e057ab5c

Benjamin Herrenschmidt (22):
      capp: Fix hang when CAPP microcode LID is missing on FSP machine
      xive: DD2.0 updates
      phb4: DD2.0 updates
      phb4: Workaround bug in spec 053
      phb3/4: Move IO VPD preload out to a common place
      phb3/4: Silence a useless warning
      hdat/vpd: Don't warn and don't create a dummy "model-name"
      psi: Use phys_map to setup the BARs
      lpc: Enable "new" SerIRQ mode
      psi: Switch to ESB mode later
      xive: Remove historical BAR reading code
      libffs: Fix ffs_lookup_part() return value
      cpu: Add a space to #threads message
      flash: Silence some messages
      init: Silence messages and call ourselves "OPAL"
      Big log level reduction...
      Move cleanup_tlb from head.S to misc.S
      Rename cleanup_tlb() to cleanup_local_tlb()
      Add "cleanup_global_tlb" for P9 and later
      cpu: Make init_hid() local to cpu.c
      cpu: Rework HILE change
      cpu: Support setting HID[RADIX] and set it by default on P9

Cyril Bur (1):
      libflash/libffs: Zero checksum words

Russell Currey (2):
      phb4: Properly mask out link down errors during reset
      phb4: Mask out write-1-to-clear registers in RC cfg

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 8b78129..d7528f5 100644
--- a/openpower/package/skiboot/Config.in
+++ b/openpower/package/skiboot/Config.in
@@ -31,7 +31,7 @@
 
 config BR2_SKIBOOT_VERSION
 	string
-	default "skiboot-5.6.0-123-g4df53124cb34" if BR2_SKIBOOT_LATEST_VERSION
+	default "skiboot-5.6.0-148-g6678e057ab5c" if BR2_SKIBOOT_LATEST_VERSION
 	default BR2_SKIBOOT_CUSTOM_VERSION_VALUE \
 		if BR2_SKIBOOT_CUSTOM_VERSION