Add most all liblvm 'get' functions needed for anaconda.

Add the most straightforward 'get' functions required for anaconda.
These are the ones that return simple uint64_t values.
The other more complex ones involve the lv_attr bits.  These will
come in a separate patch series since each lv_attr bit will be returned
in a separate API instred of returning the string and requiring the
user to parse it.


Author: Dave Wysochanski <dwysocha@redhat.com>

liblvm/lvm_pv.c

@@ -38,3 +38,7 @@ char *lvm_pv_get_name(const pv_t *pv)
 	return name;
 }
 
+uint64_t lvm_pv_get_mda_count(const pv_t *pv)
+{
+	return (uint64_t) pv_mda_count(pv);
+}