rtl8192e: remove stale defines from ccflags-y

Code paths using these defines have been removed long time ago,
now remove stale references from injected ccflags-y.
Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/rtl8192e/Makefile

-ccflags-y += -DUSE_FW_SOURCE_IMG_FILE
 ccflags-y += -DCONFIG_PM_RTL
-ccflags-y += -DCONFIG_PM
 ccflags-y += -DHAVE_NET_DEVICE_OPS
-ccflags-y += -DENABLE_DOT11D
 
 r8192e_pci-objs :=		\
 	rtl_core.o		\