[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/sni/setup.c

@@ -252,7 +252,7 @@ static inline void sni_pcimt_time_init(void)
 	rtc_mips_set_time = mc146818_set_rtc_mmss;
 }
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	sni_pcimt_detect();
 	sni_pcimt_sc_init();