[openwrt/openwrt] mediatek: replace multiple fw_setenv calls by the bulk one

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/a6b0abf4661e4dc1449494e46340f75c44df81de

commit a6b0abf4661e4dc1449494e46340f75c44df81de
Author: Mikhail Zhilkin <csharper2005 at gmail.com>
AuthorDate: Sat Jan 11 14:46:05 2025 +0000

    mediatek: replace multiple fw_setenv calls by the bulk one
    
    This commit replaces multiple fw_setenv calls by the bulk one to reduce
    flash writes.
    
    Thanks @Linaro1985 for the idea.
    
    Signed-off-by: Mikhail Zhilkin <csharper2005 at gmail.com>
    Link: https://github.com/openwrt/openwrt/pull/17580
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 .../mediatek/filogic/base-files/lib/upgrade/platform.sh  | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/target/linux/mediatek/filogic/base-files/lib/upgrade/platform.sh b/target/linux/mediatek/filogic/base-files/lib/upgrade/platform.sh
index 1d89640a4e..38019e89e5 100755
--- a/target/linux/mediatek/filogic/base-files/lib/upgrade/platform.sh
+++ b/target/linux/mediatek/filogic/base-files/lib/upgrade/platform.sh
@@ -40,13 +40,15 @@ xiaomi_initial_setup()
 		return 0
 	fi
 
-	fw_setenv boot_wait on
-	fw_setenv uart_en 1
-	fw_setenv flag_boot_rootfs 0
-	fw_setenv flag_last_success 1
-	fw_setenv flag_boot_success 1
-	fw_setenv flag_try_sys1_failed 8
-	fw_setenv flag_try_sys2_failed 8
+	fw_setenv -s - <<-EOF
+		boot_wait on
+		uart_en 1
+		flag_boot_rootfs 0
+		flag_last_success 1
+		flag_boot_success 1
+		flag_try_sys1_failed 8
+		flag_try_sys2_failed 8
+	EOF
 
 	local board=$(board_name)
 	case "$board" in