MIPS: DECstation: Migrate to new platform makefile style.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/Kbuild.platforms b/arch/mips/Kbuild.platforms
index 7973bb0..0ba692c 100644
--- a/arch/mips/Kbuild.platforms
+++ b/arch/mips/Kbuild.platforms
@@ -3,6 +3,7 @@
 platforms += alchemy
 platforms += ar7
 platforms += cobalt
+platforms += dec
 platforms += jazz
 platforms += loongson
 platforms += mipssim
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index f714c85..efaae85 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -192,14 +192,6 @@
 include $(srctree)/arch/mips/Kbuild.platforms
 
 #
-# DECstation family
-#
-core-$(CONFIG_MACH_DECSTATION)	+= arch/mips/dec/
-cflags-$(CONFIG_MACH_DECSTATION)+= -I$(srctree)/arch/mips/include/asm/mach-dec
-libs-$(CONFIG_MACH_DECSTATION)	+= arch/mips/dec/prom/
-load-$(CONFIG_MACH_DECSTATION)	+= 0xffffffff80040000
-
-#
 # Wind River PPMC Board (4KC + GT64120)
 #
 core-$(CONFIG_WR_PPMC)		+= arch/mips/gt64120/wrppmc/
diff --git a/arch/mips/dec/Makefile b/arch/mips/dec/Makefile
index c530208e..9eb2f9c 100644
--- a/arch/mips/dec/Makefile
+++ b/arch/mips/dec/Makefile
@@ -8,5 +8,3 @@
 obj-$(CONFIG_PROM_CONSOLE)	+= promcon.o
 obj-$(CONFIG_TC)		+= tc.o
 obj-$(CONFIG_CPU_HAS_WB)	+= wbflush.o
-
-EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/dec/Platform b/arch/mips/dec/Platform
new file mode 100644
index 0000000..3adbcbd
--- /dev/null
+++ b/arch/mips/dec/Platform
@@ -0,0 +1,8 @@
+#
+# DECstation family
+#
+platform-$(CONFIG_MACH_DECSTATION)	= dec/
+cflags-$(CONFIG_MACH_DECSTATION)	+= \
+			-I$(srctree)/arch/mips/include/asm/mach-dec
+libs-$(CONFIG_MACH_DECSTATION)		+= arch/mips/dec/prom/
+load-$(CONFIG_MACH_DECSTATION)		+= 0xffffffff80040000