fix translation values

Author: paul-szczepanek-arm

features/FEATURE_BLE/targets/TARGET_STM/TARGET_STM32WB/HCIDriver.cpp

@@ -134,8 +134,14 @@ class HCIDriver : public cordio::CordioHCIDriver {
 
     static uint8_t convert_db_to_tx_power_index(int8_t level_db) {
         const int8_t conversion[] = {
-            -40, -21 - 10 - 19, -18, -16, -15, -14, -13, -12, -11, -10, -9, -8,
-            -7, -6, -5, -4, -3, -2, -2, -1, -1, 0, 0, 0, 1, 2, 3, 4, 5, 6,
+            -40, -21, -20, -19,
+            -18, -16, -15, -14,
+            -13, -12, -11, -10,
+             -9,  -8,  -7,  -6,
+             -5,  -4,  -3,  -2,
+             -1,  -1,  -1,  -1,
+              0,   0,   1,   2,
+              3,   4,   5,   6
         };
 
         uint8_t index;