drivers: st: add missing includes in ETZPC header

Depending on compiler, the issue about bool or uint*_t not defined can
appear.
Correct this by adding stdbool.h and stdint.h includes in etzpc.h.

Change-Id: If1419dc511efbe682459fa4a776481fa52a38aa3
Signed-off-by: Yann Gautier <yann.gautier@st.com>

include/drivers/st/etzpc.h

@@ -7,6 +7,9 @@
 #ifndef DRIVERS_ST_ETZPC_H
 #define DRIVERS_ST_ETZPC_H
 
+#include <stdbool.h>
+#include <stdint.h>
+
 /* Define security level for each peripheral (DECPROT) */
 enum etzpc_decprot_attributes {
 	ETZPC_DECPROT_S_RW = 0,