base-files: Broadcom support for reading pending boot flash bank.

iopsys-brcm63xx-arm/base-files/lib/upgrade/target.sh

@@ -28,3 +28,12 @@ target_set_flashbank_boot() {
 		source /lib/upgrade/broadcom-iopsys-5.sh && \
 		upgrade_commit $@" || return
 }
+
+
+
+#--------------------------------------------------------------
+# Return what "bank" the bootloader will select next time.
+target_get_flashbank_boot() {
+	source "/lib/upgrade/broadcom-iopsys-5.sh" || return
+	cfe_get_boot_flashbank || return
+}