fix rockpi-s bootenv file include

Author: paolosabatino

config/boards/rockpi-s.conf

@@ -15,7 +15,6 @@ HAS_VIDEO_OUTPUT="no"
 BOOTBRANCH_BOARD="tag:v2022.04"
 BOOTPATCHDIR="u-boot-rockchip64-v2022.04"
 
-BOOTENV_FILE='rockpis.txt'
 OVERLAY_PREFIX='rk3308'
 
 #comment out line below for an image that will NOT boot from the built-in SDNAND
@@ -43,6 +42,7 @@ function post_family_config___uboot_config() {
         unset uboot_custom_postprocess family_tweaks_bsp # disable stuff from rockchip64_common
 
 	BOOTSCRIPT=boot-rockpis.cmd:boot.cmd
+	BOOTENV_FILE='rockpis.txt'
 
 	uboot_custom_postprocess() {