Add fallback for PHRB_BRANCHES, suggested by @yegroup001 in #6

Author: jiegec

include/utils.h

@@ -130,4 +130,8 @@ int virt_to_phys_user(uintptr_t *paddr, uintptr_t vaddr);
 #define PHR_BRANCHES 64
 #endif
 
+#ifndef PHRB_BRANCHES
+#define PHRB_BRANCHES 64
+#endif
+
 #endif