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/sim/mcuboot-sys/csupport/keys.c b/sim/mcuboot-sys/csupport/keys.c
index 8011629..f9325be 100644
--- a/sim/mcuboot-sys/csupport/keys.c
+++ b/sim/mcuboot-sys/csupport/keys.c
@@ -256,11 +256,20 @@
 #endif
 
 #if defined(MCUBOOT_ENCRYPT_KW)
+#if defined(MCUBOOT_AES_256)
+unsigned char enc_key[] = {
+  0xE4, 0x5C, 0x51, 0x46, 0xD2, 0x1C, 0x82, 0x35, 0xCC, 0x1A, 0x19, 0xAF,
+  0xA1, 0xF2, 0xAA, 0x20, 0xC8, 0x8C, 0x7F, 0x40, 0x6C, 0xDB, 0x22, 0xAA,
+  0x6A, 0xB5, 0xCB, 0xAA, 0xF8, 0xB1, 0x5B, 0xB4
+};
+static unsigned int enc_key_len = 32;
+#else
 unsigned char enc_key[] = {
   0xd1, 0x5a, 0x04, 0x95, 0xc4, 0xc2, 0xa8, 0xff, 0x30, 0x78, 0xce, 0x49,
   0xb5, 0xfc, 0xb2, 0xdd
 };
 static unsigned int enc_key_len = 16;
+#endif
 const struct bootutil_key bootutil_enc_key = {
     .key = enc_key,
     .len = &enc_key_len,