[installer]: fix armhf for installer.conf usage (#11121)

This fixes the build for armhf to be able to use '/device///installer.conf' files. Specifically, armhf needs support to be able to change the size of /var/log/ directory. It is hardcoded to 512 bytes on all armhf platforms currently. This change will allow any armhf platform to be able to use an installer.conf file to customize the installed image.

build_image.sh

@@ -71,12 +71,12 @@ generate_onie_installer_image()
     output_file=$OUTPUT_ONIE_IMAGE
     [ -n "$1" ] && output_file=$1
     # Copy platform-specific ONIE installer config files where onie-mk-demo.sh expects them
-    rm -rf ./installer/x86_64/platforms/
-    mkdir -p ./installer/x86_64/platforms/
+    rm -rf ./installer/${TARGET_PLATFORM}/platforms/
+    mkdir -p ./installer/${TARGET_PLATFORM}/platforms/
     for VENDOR in `ls ./device`; do
-        for PLATFORM in `ls ./device/$VENDOR`; do
+        for PLATFORM in `ls ./device/$VENDOR | grep ^${TARGET_PLATFORM}`; do
             if [ -f ./device/$VENDOR/$PLATFORM/installer.conf ]; then
-                cp ./device/$VENDOR/$PLATFORM/installer.conf ./installer/x86_64/platforms/$PLATFORM
+                cp ./device/$VENDOR/$PLATFORM/installer.conf ./installer/${TARGET_PLATFORM}/platforms/$PLATFORM
             fi
 
         done

platform/marvell-armhf/platform.conf

@@ -9,7 +9,6 @@ kernel_addr=0x1100000
 fdt_addr=0x1000000
 fdt_high=0x10fffff
 initrd_addr=0x2000000
-VAR_LOG=512
 
 kernel_fname="/boot/vmlinuz-5.10.0-12-2-armmp"
 initrd_fname="/boot/initrd.img-5.10.0-12-2-armmp"
@@ -147,8 +146,8 @@ prepare_boot_menu() {
     BORDER='echo "---------------------------------------------------";echo;'
     fw_setenv ${FW_ARG} print_menu $BORDER $BOOT1 $BOOT2 $BOOT3 $BORDER > /dev/null
 
-    fw_setenv ${FW_ARG} linuxargs "net.ifnames=0 loopfstype=squashfs loop=$image_dir/$FILESYSTEM_SQUASHFS systemd.unified_cgroup_hierarchy=0 varlog_size=$VAR_LOG loglevel=4 ${extra_cmdline_linux}" > /dev/null
-    fw_setenv ${FW_ARG} linuxargs_old "net.ifnames=0 loopfstype=squashfs loop=$image_dir_old/$FILESYSTEM_SQUASHFS systemd.unified_cgroup_hierarchy=0 varlog_size=$VAR_LOG loglevel=4" > /dev/null
+    fw_setenv ${FW_ARG} linuxargs "net.ifnames=0 loopfstype=squashfs loop=$image_dir/$FILESYSTEM_SQUASHFS systemd.unified_cgroup_hierarchy=0 varlog_size=$VAR_LOG_SIZE loglevel=4 ${extra_cmdline_linux}" > /dev/null
+    fw_setenv ${FW_ARG} linuxargs_old "net.ifnames=0 loopfstype=squashfs loop=$image_dir_old/$FILESYSTEM_SQUASHFS systemd.unified_cgroup_hierarchy=0 varlog_size=$VAR_LOG_SIZE loglevel=4" > /dev/null
 
     # Set boot configs
     fw_setenv ${FW_ARG} kernel_addr $kernel_addr > /dev/null