Add MCUBoot repo as a dependency to cppcheck

Change-Id: Icd62839b78d956449b7427f46062e62803f652f0
Signed-off-by: Tamas Ban <tamas.ban@arm.com>
diff --git a/tf-m-cppcheck.yaml b/tf-m-cppcheck.yaml
index 37ff1c4..c0495e4 100644
--- a/tf-m-cppcheck.yaml
+++ b/tf-m-cppcheck.yaml
@@ -52,6 +52,12 @@
           name: 'MBEDCRYPTO_URL'
           default: 'https://github.com/ARMmbed/mbed-crypto.git'
       - string:
+          name: 'MCUBOOT_VERSION'
+          default: 'v1.6.0'
+      - string:
+          name: 'MCUBOOT_URL'
+          default: 'https://github.com/JuulLabs-OSS/mcuboot.git'
+      - string:
           name: 'CMSIS_VERSION'
           default: '5.5.0'
       - string: