Merge pull request #1244 from stewart-ibm/skiboot-5.7-rc2

skiboot: bump to v5.7-rc2
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