fix: always quote when doing list search

Author: kwalker-plxs

CMakeLists.txt

@@ -378,7 +378,7 @@ if(NOT DEFINED CACHE{WOLFBOOT_TARGET})
         CACHE INTERNAL "Target platform")
 endif()
 
-if(${WOLFBOOT_TARGET} IN_LIST ARM_TARGETS)
+if("${WOLFBOOT_TARGET}" IN_LIST ARM_TARGETS)
     set(ARCH ARM)
 elseif(WOLFBOOT_TARGET STREQUAL "x86_64_efi")
     set(ARCH x86_64)