MIPS: BCM47xx: 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 d99704c..e4c991e 100644
--- a/arch/mips/Kbuild.platforms
+++ b/arch/mips/Kbuild.platforms
@@ -2,6 +2,7 @@
 
 platforms += alchemy
 platforms += ar7
+platforms += bcm47xx
 platforms += cobalt
 platforms += dec
 platforms += jazz
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 24ba939..b855d06 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -280,13 +280,6 @@
 load-$(CONFIG_SIBYTE_BIGSUR)	:= 0xffffffff80100000
 
 #
-# Broadcom BCM47XX boards
-#
-core-$(CONFIG_BCM47XX)		+= arch/mips/bcm47xx/
-cflags-$(CONFIG_BCM47XX)	+= -I$(srctree)/arch/mips/include/asm/mach-bcm47xx
-load-$(CONFIG_BCM47XX)		:= 0xffffffff80001000
-
-#
 # Broadcom BCM63XX boards
 #
 core-$(CONFIG_BCM63XX)		+= arch/mips/bcm63xx/
diff --git a/arch/mips/bcm47xx/Platform b/arch/mips/bcm47xx/Platform
new file mode 100644
index 0000000..874b7ca
--- /dev/null
+++ b/arch/mips/bcm47xx/Platform
@@ -0,0 +1,7 @@
+#
+# Broadcom BCM47XX boards
+#
+platform-$(CONFIG_BCM47XX)	+= bcm47xx/
+cflags-$(CONFIG_BCM47XX)	+=					\
+		-I$(srctree)/arch/mips/include/asm/mach-bcm47xx
+load-$(CONFIG_BCM47XX)		:= 0xffffffff80001000