MIPS: Move Alchemy Makefile parts to their own Platform file.

[Ralf: Remove a forgotten -Werror in Pb1200 Makefile.]

Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
To: Linux-MIPS <linux-mips@linux-mips.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Manuel Lauss <manuel.lauss@googlemail.com>
Patchwork: https://patchwork.linux-mips.org/patch/1319/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/Kbuild.platforms b/arch/mips/Kbuild.platforms
index 13244f3..68794bb 100644
--- a/arch/mips/Kbuild.platforms
+++ b/arch/mips/Kbuild.platforms
@@ -1,5 +1,6 @@
 # All platforms listed in alphabetic order
 
+platforms += alchemy
 platforms += ar7
 platforms += loongson
 platforms += mipssim