Add critical sensor units to lcd display

Get sensor type from path and add its unit to output
on debug card LCD display.

Tested: verified with lcd debug card screen.

Change-Id: I7caf7d7b58d25662614ee38b1c84d5d32808d2f3
Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
diff --git a/src/usb-dbg.cpp b/src/usb-dbg.cpp
index 9fa0553..6a3e1ad 100644
--- a/src/usb-dbg.cpp
+++ b/src/usb-dbg.cpp
@@ -69,7 +69,8 @@
 namespace storage
 {
 int getSensorValue(std::string &, double &);
-}
+int getSensorUnit(std::string &, std::string &);
+} // namespace storage
 
 typedef struct _sensor_desc
 {
@@ -805,6 +806,12 @@
                     senStr = senName;
 
                 senStr += ss.str();
+
+                /* Get unit string for sensor and append in output */
+                std::string unitStr;
+                if (ipmi::storage::getSensorUnit(senName, unitStr) == 0)
+                    senStr += unitStr;
+
                 frame_snr.append(senStr.c_str(), 0);
             }
             else