Infineon: Add cyw20829 platform, shared slot feature, json memory map, psoc6 xip

Based in 1.8.0 release of MCUBoot library

This commit adds CYW20829 Infineon platform support with following capabilities:
1. Overwrite and swap upgrade mode support
2. Multi-image with up to 4 images
3. Hardware security counter is supported for CYW20829 platform

Add XIP support for PSOC6 platform - place BOOT slot in external memory and execute it in place using SMIF in XIP mode

and some new features for Infineon devices.

1. Shared upgrade slot feature - use one shared area for upgrade slots of multiple images
2. Memory map defined using JSON file - define memory regions for bootloader and user app in conventional way using JSON file
diff --git a/samples/mcuboot_config/mcuboot_config.template.h b/samples/mcuboot_config/mcuboot_config.template.h
index 2125792..989ec61 100644
--- a/samples/mcuboot_config/mcuboot_config.template.h
+++ b/samples/mcuboot_config/mcuboot_config.template.h
@@ -146,4 +146,14 @@
  *    do { do watchdog feeding here! } while (0)
  */
 
+/* If a OS ports support single thread mode or is bare-metal then:
+ * This macro implements call that switches CPU to an idle state, from which
+ * the CPU may be woken up by, for example, UART transmission event.
+ * 
+ * Otherwise this macro should be no-op.
+ */
+#define MCUBOOT_CPU_IDLE() \
+    do {                   \
+    } while (0)
+
 #endif /* __MCUBOOT_CONFIG_H__ */