Fix RFM95 reset (#982)

I've verified that the datasheet says to go low, and checked that the commit history does not indicate a reason for doing otherwise.

Author: tekka007

drivers/RFM95/RFM95.cpp

@@ -138,10 +138,10 @@ LOCAL bool RFM95_initialise(const uint32_t frequencyHz)
 	RFM95_powerUp();
 #if defined(MY_RFM95_RST_PIN)
 	hwPinMode(MY_RFM95_RST_PIN, OUTPUT);
-	hwDigitalWrite(MY_RFM95_RST_PIN, HIGH);
+	hwDigitalWrite(MY_RFM95_RST_PIN, LOW);
 	// 100uS
 	delayMicroseconds(100);
-	hwDigitalWrite(MY_RFM95_RST_PIN, LOW);
+	hwDigitalWrite(MY_RFM95_RST_PIN, HIGH);
 	// wait until chip ready
 	delay(5);
 	RFM95_DEBUG(PSTR("RFM95:INIT:PIN,CS=%" PRIu8 ",IQP=%" PRIu8 ",IQN=%" PRIu8 ",RST=%" PRIu8 "\n"),