[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>
diff --git a/arch/mips/sni/setup.c b/arch/mips/sni/setup.c
index c33cb9d..635b904 100644
--- a/arch/mips/sni/setup.c
+++ b/arch/mips/sni/setup.c
@@ -252,7 +252,7 @@
 	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();