MIPS: Malta: Consolidate platform device code.

After adding the RTC platform device to malta-platform.c malta-mtd.c should
get unified with the rest of the platform device code.
diff --git a/arch/mips/mti-malta/Makefile b/arch/mips/mti-malta/Makefile
index cef2db8..32e8478 100644
--- a/arch/mips/mti-malta/Makefile
+++ b/arch/mips/mti-malta/Makefile
@@ -7,9 +7,8 @@
 #
 obj-y				:= malta-amon.o malta-cmdline.o \
 				   malta-display.o malta-init.o malta-int.o \
-				   malta-memory.o malta-mtd.o \
-				   malta-platform.o malta-reset.o \
-				   malta-setup.o malta-time.o
+				   malta-memory.o malta-platform.o \
+				   malta-reset.o malta-setup.o malta-time.o
 
 obj-$(CONFIG_EARLY_PRINTK)	+= malta-console.o
 obj-$(CONFIG_PCI)		+= malta-pci.o