riscv: Move strlen to util

include/util.h

@@ -89,6 +89,7 @@ void memzero(void *s, unsigned long n);
 void *memset(void *s, unsigned long c, unsigned long n) VISIBLE;
 void *memcpy(void* ptr_dst, const void* ptr_src, unsigned long n) VISIBLE;
 int PURE strncmp(const char *s1, const char *s2, int n);
+unsigned long strlen(const char *s);
 long CONST char_to_long(char c);
 long PURE str_to_long(const char* str);
 

src/plat/spike/machine/fdt.c

@@ -78,15 +78,6 @@ const char fdt_memory[] = {'m', 'e', 'm', 'o', 'r', 'y', 0};
 
 // RVTODO: this code needs to updated to not have function pointers or string literals "like this"
 // and any of these appropriate string functions should be moved to common utils
-static word_t strlen(const char *s)
-{
-    const char *p = s;
-    while (*p) {
-        p++;
-    }
-    return p - s;
-}
-
 static int strcmp(const char* s1, const char* s2)
 {
     unsigned char c1, c2;

src/util.c

@@ -95,6 +95,16 @@ strncmp(const char* s1, const char* s2, int n)
     return 0;
 }
 
+unsigned long
+strlen(const char *s)
+{
+    const char *p = s;
+    while (*p) {
+        p++;
+    }
+    return p - s;
+}
+
 long CONST
 char_to_long(char c)
 {