kernel symbol for lemote got a new name

target/mips64/kernel/lemote-yeelong

@@ -1,5 +1,6 @@
 CONFIG_MIPS=y
 CONFIG_MACH_LOONGSON=y
+CONFIG_MACH_LOONGSON64=y
 CONFIG_LEMOTE_MACH2F=y
 CONFIG_CS5536=y
 CONFIG_CPU_LOONGSON2F=y