MIPS: EMMA: 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 a4bda75..8985487 100644
--- a/arch/mips/Kbuild.platforms
+++ b/arch/mips/Kbuild.platforms
@@ -7,6 +7,7 @@
 platforms += cavium-octeon
 platforms += cobalt
 platforms += dec
+platforms += emma
 platforms += jazz
 platforms += lasat
 platforms += loongson