Bump skiboot to skiboot-5.6.0-158-ga1e0a047b2a0

Anju T Sudhakar (2):
      skiboot: Add opal calls to init/start/stop IMC devices
      skiboot: Add documentation for IMC opal call

Hemant Kumar (2):
      skiboot: Nest IMC macro definitions
      skiboot: Add a library for xz

Madhavan Srinivasan (6):
      skiboot/doc: Add doc/imc.rst documentation
      skiboot/doc: Add devicetree binding document for IMC
      dt: Add helper function for last_phandle updates
      dt: Add phandle fixup helpers
      skiboot: Find the IMC DTB
      skiboot: Handle combined units node in the imc dt

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 d7528f5..59c0ad6 100644
--- a/openpower/package/skiboot/Config.in
+++ b/openpower/package/skiboot/Config.in
@@ -31,7 +31,7 @@
 
 config BR2_SKIBOOT_VERSION
 	string
-	default "skiboot-5.6.0-148-g6678e057ab5c" if BR2_SKIBOOT_LATEST_VERSION
+	default "skiboot-5.6.0-158-ga1e0a047b2a0" if BR2_SKIBOOT_LATEST_VERSION
 	default BR2_SKIBOOT_CUSTOM_VERSION_VALUE \
 		if BR2_SKIBOOT_CUSTOM_VERSION