Staging: sep: remove extra CFLAGS we don't use

Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/sep/Makefile

-EXTRA_CFLAGS += -DLITTLE__ENDIAN -DDX_CC5_SEP_PLAT -DCRYS_NO_EXT_IF_MODE_SUPPORT
 obj-$(CONFIG_DX_SEP) := sep_driver.o