api: Add FreeBSD API support for MIPS platforms

This patch adds U-Boot API support (used by FreeBSD loader) for MIPS platforms.

Signed-off-by: Stanislav Galabov <sgalabov@gmail.com>
diff --git a/api/Makefile b/api/Makefile
index 3c095ee..14b7608 100644
--- a/api/Makefile
+++ b/api/Makefile
@@ -7,3 +7,4 @@
 obj-y += api.o api_display.o api_net.o api_storage.o
 obj-$(CONFIG_ARM) += api_platform-arm.o
 obj-$(CONFIG_PPC) += api_platform-powerpc.o
+obj-$(CONFIG_MIPS) += api_platform-mips.o