[SWDEV-520665] Add support for board voltage (#303)

* Add the API and CLI to show the board voltage. 

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Change-Id: Icb25bd653bb1d004704b5a21b378ca31b2b242c7
Signed-off-by: Arif, Maisam <Maisam.Arif@amd.com>
Signed-off-by: AL Musaffar, Yazen <Yazen.ALMusaffar@amd.com>

include/amd_smi/amdsmi.h

@@ -1360,7 +1360,8 @@ typedef enum {
     AMDSMI_VOLT_TYPE_FIRST = 0,
 
     AMDSMI_VOLT_TYPE_VDDGFX = AMDSMI_VOLT_TYPE_FIRST,  //!< Vddgfx GPU voltage
-    AMDSMI_VOLT_TYPE_LAST = AMDSMI_VOLT_TYPE_VDDGFX,
+    AMDSMI_VOLT_TYPE_VDDBOARD,                        //!< Voltage for VDDBOARD
+    AMDSMI_VOLT_TYPE_LAST = AMDSMI_VOLT_TYPE_VDDBOARD,
     AMDSMI_VOLT_TYPE_INVALID = 0xFFFFFFFF              //!< Invalid type
 } amdsmi_voltage_type_t;