iwmc3200wifi: check sparse endianness annotations

Add -D__CHECK_ENDIAN__ to driver ccflags so that sparse will
always check endianness by default.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwmc3200wifi/Makefile

@@ -6,3 +6,5 @@ iwmc3200wifi-$(CONFIG_IWM_DEBUG) += debugfs.o
 iwmc3200wifi-$(CONFIG_IWM_TRACING) += trace.o
 
 CFLAGS_trace.o := -I$(src)
+
+ccflags-y += -D__CHECK_ENDIAN__