[MIPS] Cleanup memory managment initialization.

Historically plat_mem_setup did the entire platform initialization.  This
was rather impractical because it meant plat_mem_setup had to get away
without any kind of memory allocator.  To keep old code from breaking
plat_setup was just renamed to plat_setup and a second platform
initialization hook for anything else was introduced.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/dec/setup.c

@@ -147,7 +147,7 @@ static void __init dec_be_init(void)
 extern void dec_time_init(void);
 extern void dec_timer_setup(struct irqaction *);
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	board_be_init = dec_be_init;
 	board_time_init = dec_time_init;