Fix missing var for DGUS_LCD_UI_ORIGIN (#17819)

Marlin/src/lcd/extui/lib/dgus/origin/DGUSDisplayDef.h

@@ -192,7 +192,7 @@ constexpr uint16_t VP_Flowrate_E1 = 0x3092; // 2 Byte Integer
 //constexpr uint16_t VP_Flowrate_E5 = 0x309A;
 
 constexpr uint16_t VP_Fan0_Percentage = 0x3100;  // 2 Byte Integer (0..100)
-//constexpr uint16_t VP_Fan1_Percentage = 0x33A2;  // 2 Byte Integer (0..100)
+constexpr uint16_t VP_Fan1_Percentage = 0x33A2;  // 2 Byte Integer (0..100)
 //constexpr uint16_t VP_Fan2_Percentage = 0x33A4;  // 2 Byte Integer (0..100)
 //constexpr uint16_t VP_Fan3_Percentage = 0x33A6;  // 2 Byte Integer (0..100)