simplified MMU initialization

removed (apparently unneeded) MMU TLBs
added source file templates for SPI dma routines

include/bas_string.h

@@ -17,6 +17,7 @@ extern size_t strlen(const char *str);
 extern char *strcat(char *dst, const char *src);
 extern char *strncat(char *dst, const char *src, int max);
 extern int atoi(const char *c);
+extern void *memcpy(void *dst, const void *src, size_t n);
 
 #define isdigit(c)	(((c) >= '0') && ((c) <= '9'))
 #define isupper(c)	((c) >= 'A' && ((c) <= 'Z'))