microblaze: Remove platform folder

There is no reason to use platform folder structure now.
Everything is OF driven.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/microblaze/Kconfig

@@ -74,7 +74,7 @@ source "init/Kconfig"
 
 source "kernel/Kconfig.freezer"
 
-source "arch/microblaze/platform/Kconfig.platform"
+source "arch/microblaze/Kconfig.platform"
 
 menu "Processor type and features"
 

arch/microblaze/Makefile

@@ -48,7 +48,6 @@ head-y := arch/microblaze/kernel/head.o
 libs-y += arch/microblaze/lib/
 core-y += arch/microblaze/kernel/
 core-y += arch/microblaze/mm/
-core-y += arch/microblaze/platform/
 core-$(CONFIG_PCI) += arch/microblaze/pci/
 
 drivers-$(CONFIG_OPROFILE) += arch/microblaze/oprofile/

arch/microblaze/kernel/Makefile

@@ -16,7 +16,7 @@ extra-y := head.o vmlinux.lds
 
 obj-y += dma.o exceptions.o \
 	hw_exception_handler.o intc.o irq.o \
-	process.o prom.o prom_parse.o ptrace.o \
+	platform.o process.o prom.o prom_parse.o ptrace.o \
 	reset.o setup.o signal.o sys_microblaze.o timer.o traps.o unwind.o
 
 obj-y += cpu/

arch/microblaze/platform/Makefile

@@ -1,5 +0,0 @@
-#
-# Makefile for arch/microblaze/platform directory
-#
-
-obj-y	+= platform.o