Fix static analysis failure

src/modules/CC1101/CC1101.h

@@ -832,7 +832,7 @@ class CC1101: public PhysicalLayer {
       \param len Sync word length in bytes. Maximum length depends on the module used.
       \returns \ref status_codes
     */
-    int16_t setSyncWord(uint8_t* sync, size_t len);
+    int16_t setSyncWord(uint8_t *sync, size_t len) override;
 
     /*!
       \brief Sets 16-bit sync word as a two byte value.
@@ -859,7 +859,7 @@ class CC1101: public PhysicalLayer {
       \param len Preamble length to be set (in bits), allowed values: 16, 24, 32, 48, 64, 96, 128 and 192.
       \returns \ref status_codes
     */
-    int16_t setPreambleLength(size_t len);
+    int16_t setPreambleLength(size_t len) override;
 
     /*!
       \brief Sets preamble length.

src/modules/RF69/RF69.h

@@ -796,7 +796,7 @@ class RF69: public PhysicalLayer {
       \param preambleLen Preamble length to be set (in bits), allowed values: 16, 24, 32, 48, 64, 96, 128 and 192.
       \returns \ref status_codes
     */
-    int16_t setPreambleLength(size_t preambleLen);
+    int16_t setPreambleLength(size_t preambleLen) override;
 
     /*!
       \brief Sets node address. Calling this method will also enable address filtering for node address only.

src/modules/SX128x/SX128x.h

@@ -669,7 +669,7 @@ class SX128x: public PhysicalLayer {
       \param preambleLength Preamble length to be set in symbols (LoRa) or bits (FSK/BLE/FLRC).
       \returns \ref status_codes
     */
-    int16_t setPreambleLength(size_t preambleLength);
+    int16_t setPreambleLength(size_t preambleLength) override;
 
     /*!
       \brief Set data rate.

src/modules/Si443x/Si443x.h

@@ -752,7 +752,7 @@ class Si443x: public PhysicalLayer {
       \param preambleLen Preamble length to be set (in bits).
       \returns \ref status_codes
     */
-    int16_t setPreambleLength(size_t preambleLen);
+    int16_t setPreambleLength(size_t preambleLen) override;
 
      /*!
       \brief Query modem for the packet length of received payload.