fix(x10-express): Touch Screen Mod PCBREV check failing in cold temps(EdgeTX#4529)

Author: MRC3742

radio/src/targets/common/arm/stm32/pwr_driver.cpp

@@ -70,6 +70,15 @@ void pwrInit()
   #endif
   GPIO_InitStructure.GPIO_Pin = PCBREV_GPIO_PIN;
   GPIO_Init(PCBREV_GPIO, &GPIO_InitStructure);
+  #if defined(PCBREV_TOUCH_GPIO_PIN)
+    #if defined(PCBREV_TOUCH_GPIO_PULL_UP)
+      GPIO_ResetBits(PCBREV_TOUCH_GPIO, PCBREV_TOUCH_GPIO_PIN);
+      GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
+    #endif
+  GPIO_InitStructure.GPIO_Pin = PCBREV_TOUCH_GPIO_PIN;
+  GPIO_Init(PCBREV_TOUCH_GPIO, &GPIO_InitStructure);
+  #endif
+
   hardwareOptions.pcbrev = PCBREV_VALUE();
 #endif
 }

radio/src/targets/horus/hal.h

@@ -419,6 +419,7 @@
   #define PCBREV_GPIO_PIN               (GPIO_Pin_7 | GPIO_Pin_8)  // PH.07 | PH.08
   #define PCBREV_TOUCH_GPIO             GPIOA
   #define PCBREV_TOUCH_GPIO_PIN         GPIO_Pin_6  // PA.06
+  #define PCBREV_TOUCH_GPIO_PULL_UP
   #define PCBREV_VALUE()                ((GPIO_ReadInputDataBit(PCBREV_GPIO, GPIO_Pin_7) + (GPIO_ReadInputDataBit(PCBREV_GPIO, GPIO_Pin_8) << 1)) * GPIO_ReadInputDataBit(PCBREV_TOUCH_GPIO, GPIO_Pin_6))
 #else
   #define PCBREV_RCC_AHB1Periph         RCC_AHB1Periph_GPIOI