eeprom: update pt5161l getVersion()

Add a step to read fw_load_status before fetching the firmware
version. This ensures the service only proceeds when the device
reports a normal status.

Test on Harma:
```
<7> Host state xyz.openbmc_project.State.Host.HostState.Running matches to retrieve the version
<3> Status from file: /sys/kernel/debug/pt5161l/21-0024/fw_load_status is invalid: abnormal
<7> Host state xyz.openbmc_project.State.Host.HostState.Running matches to retrieve the version
<7> Device version is ready
<7> Harma_MB_Retimer_0_2251: set version 2.8.19
<7> Device version is ready
<7> Harma_MB_Retimer_1_8040: set version 2.8.19
```

Change-Id: I7b665652d8bee20956da3e3d15ff1d222560a656
Signed-off-by: Daniel Hsu <Daniel-Hsu@quantatw.com>
diff --git a/eeprom-device/pt5161l/pt5161l.cpp b/eeprom-device/pt5161l/pt5161l.cpp
index 2406862..1cc51df 100644
--- a/eeprom-device/pt5161l/pt5161l.cpp
+++ b/eeprom-device/pt5161l/pt5161l.cpp
@@ -39,6 +39,32 @@
     return version;
 }
 
+bool PT5161LDeviceVersion::isDeviceReady()
+{
+    std::string status;
+    std::ostringstream busOss;
+    std::ostringstream addrOss;
+
+    busOss << std::setw(2) << std::setfill('0') << static_cast<int>(bus);
+    addrOss << std::setw(4) << std::setfill('0') << std::hex << std::nouppercase
+            << static_cast<int>(address);
+
+    std::string fw_load_status = "/sys/kernel/debug/pt5161l/" + busOss.str() +
+                                 "-" + addrOss.str() + "/fw_load_status";
+
+    std::ifstream file(fw_load_status);
+
+    if (file && std::getline(file, status) && status == "normal")
+    {
+        return true;
+    }
+
+    error("Status from file: {PATH} is invalid: {STATUS}", "PATH",
+          fw_load_status, "STATUS", status);
+
+    return false;
+}
+
 std::optional<HostPowerInf::HostState>
     PT5161LDeviceVersion::getHostStateToQueryVersion()
 {