more bpmpfw shenanigans

Source/hoc-clk/bpmpfw/source/libc/src/fslc_strpbrk.c

@@ -0,0 +1,14 @@
+#include "fslc_string.h"
+
+char *fslc_strpbrk(const char *str, const char *delim)
+{
+    for (; *str; ++str)
+    {
+        const char *d;
+        for (d = delim; *d; ++d)
+            if (*str == *d)
+                return (char *)str;
+    }
+
+    return NULL;
+}