powerpc/qe: Limit QE support to ppc32

Only 32-bit SoCs have a QUICC Engine so limit the config option to PPC32.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig
index f970ca2..546ceea 100644
--- a/arch/powerpc/platforms/Kconfig
+++ b/arch/powerpc/platforms/Kconfig
@@ -266,7 +266,7 @@
 
 config QUICC_ENGINE
 	bool "Freescale QUICC Engine (QE) Support"
-	depends on FSL_SOC
+	depends on FSL_SOC && PPC32
 	select PPC_LIB_RHEAP
 	select CRC32
 	help