zephyr/zephyr_storage: Use stdint.h types.
zephyr/zephyr_storage: Use stdint.h types.

Zephyr migrated to use uint8_t, etc. instead of u8_t, etc.

Change-Id: Ib310b342915e8d9b8d7a6608f1b1fdb098c3ac95
Signed-off-by: Paul Sokolovsky <9dc5061f178bb11813e14f1ed02ba27eaf21fa5d@users.sourceforge.net>

pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython