Add utility to log hex buffer with size len (LOG_D) and remove unused legacy hex_dump

* logging buffer is pretty useful for debugging purposes, e.g. derived key values

common/utils/utils.c

@@ -7,34 +7,6 @@
 #include <errno.h>
 #include "utils.h"
 
-
-
-const char *hexdump(const void *data, size_t data_len, char *out, size_t out_len)
-{
-    char *p = out;
-    char *endp = out + out_len;
-    const uint8_t *q = data;
-    snprintf(p, endp - p, "[%zu]", data_len);
-    p += strlen(p);
-    for (size_t i = 0; i < data_len; ++i)
-    {
-        if (p >= endp)
-        {
-            static const char ellipses[] = "...";
-            char *s = endp - sizeof(ellipses);
-            if (s >= p)
-            {
-                strcpy(s, ellipses);
-            }
-            break;
-        }
-        snprintf(p, endp - p, " %02X", *q++);
-        p += strlen(p);
-    }
-    return out;
-}
-
-
 /****************************************************************************
  **                                                                        **
  ** Name:        hex_char_to_hex_value()                                   **

common/utils/utils.h

@@ -109,8 +109,6 @@ static inline void *malloc_or_fail(size_t size)
 #define PAGE_MASK 0xfffff000
 #define virt_to_phys(x) (x)
 
-const char *hexdump(const void *data, size_t data_len, char *out, size_t out_len);
-
 // Converts an hexadecimal ASCII coded digit into its value. **
 int hex_char_to_hex_value (char c);
 // Converts an hexadecimal ASCII coded string into its value.**