Fixed some compile errors on original code

Dependencies:   ST_401_84MHZ

Revision:
3:e1d130f34972
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Fri May 28 17:42:45 2021 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#5941d1718339116cd12914238ec331c84da3d08f