armv8 cortex-a53/57: allow thumb2

target/config/Config.in.cpu

@@ -165,6 +165,7 @@ config ADK_TARGET_CPU_ARM_CORTEX_A53
 	select ADK_TARGET_SUPPORTS_LT
 	select ADK_TARGET_CPU_WITH_FPU_VFPV4
 	select ADK_TARGET_CPU_WITH_NEON
+	select ADK_TARGET_CPU_WITH_THUMB2
 	depends on ADK_TARGET_ARCH_ARM
 
 config ADK_TARGET_CPU_ARM_CORTEX_A57
@@ -174,6 +175,7 @@ config ADK_TARGET_CPU_ARM_CORTEX_A57
 	select ADK_TARGET_SUPPORTS_LT
 	select ADK_TARGET_CPU_WITH_FPU_VFPV4
 	select ADK_TARGET_CPU_WITH_NEON
+	select ADK_TARGET_CPU_WITH_THUMB2
 	depends on ADK_TARGET_ARCH_ARM
 
 config ADK_TARGET_CPU_ARM_CORTEX_M7