Removing mbed.h inclusion

It's better to include what we need rather than whole mbed.h.
Small style knits.

SX1272/SX1272_LoRaRadio.cpp

@@ -332,7 +332,7 @@ void SX1272_LoRaRadio::set_operation_mode(uint8_t mode)
  * At initialization FSK is chosen. Later stack or application
  * can choose to change.
  */
-void SX1272_LoRaRadio::set_modem(uint8_t modem )
+void SX1272_LoRaRadio::set_modem(uint8_t modem)
 {
     if ((read_register(REG_OPMODE) & RFLR_OPMODE_LONGRANGEMODE_ON) != 0 ) {
         _rf_settings.modem = MODEM_LORA;

SX1276/SX1276_LoRaRadio.cpp

@@ -25,7 +25,14 @@ SPDX-License-Identifier: BSD-3-Clause
 #include <stdio.h>
 #include <math.h> //rint
 #include <string.h>
-#include "mbed.h"
+#include "PinNames.h"
+#include "Callback.h"
+#include "mbed_wait_api.h"
+#include "Timer.h"
+#ifdef MBED_CONF_RTOS_PRESENT
+#include "ThisThread.h"
+using namespace rtos;
+#endif
 #include "SX1276_LoRaRadio.h"
 #include "sx1276Regs-Fsk.h"
 #include "sx1276Regs-LoRa.h"
@@ -153,6 +160,7 @@ enum RadioVariant {
 #define SPI_FREQUENCY    8000000
 #endif
 
+using namespace mbed;
 /**
  * Constructor
  */

SX1276/SX1276_LoRaRadio.h

@@ -382,7 +382,7 @@ private:
 
     // Data buffer used for both TX and RX
     // Size of this buffer is configurable via Mbed config system
-    // Default is 256 bytes
+    // Default is 255 bytes
     uint8_t _data_buffer[MAX_DATA_BUFFER_SIZE_SX1276];
 
     // TX timer in ms. This timer is used as a fail safe for TX.