change(micropython): Create weak link from `(u)module` to `module`

Create weak links from MicroPython specific implementations of
modules to standard names. I.e. allow `import time` to import
utime module.

pycardium/mpconfigport.h

@@ -24,6 +24,12 @@
 
 #define MICROPY_ENABLE_SOURCE_LINE          (1)
 
+/* Create weak links from MicroPython specific
+ * implementations of modules to standard names.
+ * I.e. allow `import time` to import utime module.
+ */
+#define MICROPY_MODULE_WEAK_LINKS           (1)
+
 /* urandom init */
 int mp_hal_trng_read_int(void);