Build: Update MCUboot tag to latest release: v1.7.0

Signed-off-by: Tamas Ban <tamas.ban@arm.com>
Change-Id: I40b79f618efc409b496e1e12d458752087be57d4
diff --git a/config/config_default.cmake b/config/config_default.cmake
index 5774aab..ade7c35 100644
--- a/config/config_default.cmake
+++ b/config/config_default.cmake
@@ -145,7 +145,7 @@
 set(CMSIS_5_PATH                        "DOWNLOAD"  CACHE PATH      "Path to CMSIS_5 (or DOWNLOAD to fetch automatically")
 
 set(MCUBOOT_PATH                        "DOWNLOAD"  CACHE PATH      "Path to MCUboot (or DOWNLOAD to fetch automatically")
-set(MCUBOOT_VERSION                     "1.7.0-rc1" CACHE STRING    "The version of MCUboot to use")
+set(MCUBOOT_VERSION                     "v1.7.0"    CACHE STRING    "The version of MCUboot to use")
 
 set(PSA_ARCH_TESTS_PATH                 "DOWNLOAD"  CACHE PATH      "Path to PSA arch tests (or DOWNLOAD to fetch automatically")
 set(PSA_ARCH_TESTS_VERSION              "90c8e680"  CACHE STRING    "The version of PSA arch tests to use")