ppc: allow SPE built as hard-float toolchain

target/config/Config.in.float

@@ -14,7 +14,7 @@ depends on ADK_TARGET_ARCH_ARC || \
 
 config ADK_TARGET_HARD_FLOAT
 	bool "hard-float"
-	depends on ADK_TARGET_CPU_WITH_FPU \
+	depends on ADK_TARGET_CPU_WITH_FPU || ADK_TARGET_ARCH_PPC_WITH_SPE \
 		&& !ADK_TARGET_CPU_WITH_FPU_FPV5
 
 config ADK_TARGET_HARD_FLOAT_SP