Also implement LR11x10 AGC reset

Similar to SX126x but simpler.

src/helpers/radiolib/LR11x0Reset.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <RadioLib.h>
+
+// Full receiver reset for LR11x0-family chips (LR1110, LR1120, LR1121).
+// Warm sleep powers down analog, calibrate(0x3F) refreshes all calibration blocks,
+// then re-applies RX settings that calibration may reset.
+inline void lr11x0ResetAGC(LR11x0* radio) {
+  radio->sleep(true, 0);
+  radio->standby(RADIOLIB_LR11X0_STANDBY_RC, true);
+
+  radio->calibrate(RADIOLIB_LR11X0_CALIBRATE_ALL);
+
+#ifdef RX_BOOSTED_GAIN
+  radio->setRxBoostedGainMode(RX_BOOSTED_GAIN);
+#endif
+}