Revert "rpi-eeprom-update: Surround [:print:] with quotes"

This reverts commit f14fc0f.

Author: timg236

rpi-eeprom-update

@@ -111,7 +111,7 @@ getBootloaderConfig() {
    local blconfig_nvmem_path=""
 
    if [ -f "${blconfig_alias}" ]; then
-      local blconfig_ofnode_path="/sys/firmware/devicetree/base"$(tr -cd '[:print:]' < "${blconfig_alias}")""
+      local blconfig_ofnode_path="/sys/firmware/devicetree/base"$(tr -cd [:print:] < "${blconfig_alias}")""
       local blconfig_ofnode_link=$(find -L /sys/bus/nvmem -samefile "${blconfig_ofnode_path}" 2>/dev/null)
 
       if [ -e "${blconfig_ofnode_link}" ]; then
@@ -286,7 +286,7 @@ getBootloaderUpdateVersion() {
    match=".*/pieeprom-[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9].bin"
    latest="$(find "${FIRMWARE_IMAGE_DIR}/" -maxdepth 1 -type f -size "${EEPROM_SIZE}c" -regex "${match}" | sort -r | head -n1)"
    if [ -f "${latest}" ]; then
-      BOOTLOADER_UPDATE_VERSION=$(tr -c '[:print:]' "\n" < "${latest}" | sed '/^BUILD_TIMESTAMP=/s/.*=//p;d')
+      BOOTLOADER_UPDATE_VERSION=$(tr -c [:print:] "\n" < "${latest}" | sed '/^BUILD_TIMESTAMP=/s/.*=//p;d')
       BOOTLOADER_UPDATE_IMAGE="${latest}"
    fi
 }