MIPS: Lemote 2F: Fix build caused by recent mass rename.

  CC      arch/mips/loongson64/lemote-2f/clock.o
/home/ralf/src/linux/linux-mips/arch/mips/loongson64/lemote-2f/clock.c:18:40: fatal error: asm/mach-loongson/loongson.h: No such file or directory
 #include <asm/mach-loongson/loongson.h>
                                        ^
compilation terminated.
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/loongson64/lemote-2f/clock.c

@@ -15,7 +15,7 @@
 #include <linux/spinlock.h>
 
 #include <asm/clock.h>
-#include <asm/mach-loongson/loongson.h>
+#include <asm/mach-loongson64/loongson.h>
 
 static LIST_HEAD(clock_list);
 static DEFINE_SPINLOCK(clock_lock);