wiseconnect: Drop ip_to_reverse_hex()

ip_to_reverse_hex() relies son sscanf(). However sscanf() is not
available in minimal configuration of Zephyr.

However, ip_to_reverse_hex() is orphan and can be safely dropped.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>

wiseconnect/components/device/silabs/si91x/wireless/ble/inc/rsi_utils.h

@@ -74,7 +74,6 @@ void string2array(uint8_t *dst, const uint8_t *src, uint32_t length);
 int32_t rsi_atoi(const int8_t *str);
 void rsi_ascii_dot_address_to_4bytes(uint8_t *hexAddr, int8_t *asciiDotAddress);
 void rsi_ascii_mac_address_to_6bytes(uint8_t *hexAddr, int8_t *asciiMacAddress);
-uint64_t ip_to_reverse_hex(const char *ip);
 
 int8_t rsi_ascii_hex2num(int8_t ascii_hex_in);
 int8_t rsi_char_hex2dec(int8_t *cBuf);

wiseconnect/components/device/silabs/si91x/wireless/ble/src/rsi_utils.c

@@ -484,31 +484,6 @@ void rsi_ascii_dot_address_to_4bytes(uint8_t *hexAddr, int8_t *asciiDotAddress)
   hexAddr[byteNum] = (uint8_t)rsi_atoi(cBuf);
 }
 /*=============================================================================*/
-/**
- * @fn         uint64_t ip_to_reverse_hex(char *ip)
- * @brief      Convert IP address to reverse Hex format.  
- * @param[in]  ip - IP address to convert. 
- * @return     IP address in reverse Hex format 
- */
-uint64_t ip_to_reverse_hex(const char *ip)
-{
-  long unsigned int ip1, ip2, ip3, ip4;
-  uint64_t ip_hex;
-  uint32_t status;
-
-  status = sscanf(ip, "%lu.%lu.%lu.%lu", &ip1, &ip2, &ip3, &ip4);
-  if (status != 4) {
-    return 0x00000000; // Problem if we actually pass 0.0.0.0
-  }
-
-  ip_hex = (uint64_t)ip1;
-  ip_hex |= (uint64_t)(ip2 << 8);
-  ip_hex |= (uint64_t)(ip3 << 16);
-  ip_hex |= (uint64_t)(ip4 << 24);
-
-  return ip_hex;
-}
-/*=============================================================================*/
 /**
  * @fn         uint32_t rsi_ntohl(uint32_t a)
  * @brief      Converts the unsigned integer from network byte order to host byte order.