mpc8xx_pcmcia: move CONFIG_8xx out of .c file and into Makefile

Move the CONFIG_8xx mpc8xx_pcmcia.c protection out of the C file and
into the Makefile so we avoid pointless compiling of the file.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/drivers/pcmcia/Makefile b/drivers/pcmcia/Makefile
index ba251d0..babe3ec 100644
--- a/drivers/pcmcia/Makefile
+++ b/drivers/pcmcia/Makefile
@@ -26,7 +26,7 @@
 LIB	:= $(obj)libpcmcia.a
 
 COBJS-$(CONFIG_I82365) += i82365.o
-COBJS-y += mpc8xx_pcmcia.o
+COBJS-$(CONFIG_8xx) += mpc8xx_pcmcia.o
 COBJS-$(CONFIG_PXA_PCMCIA) += pxa_pcmcia.o
 COBJS-y += rpx_pcmcia.o
 COBJS-$(CONFIG_IDE_TI_CARDBUS) += ti_pci1410a.o