[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/sgi-ip27/ip27-init.c

@@ -196,7 +196,7 @@ extern void ip27_setup_console(void);
 extern void ip27_time_init(void);
 extern void ip27_reboot_setup(void);
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	hubreg_t p, e, n_mode;
 	nasid_t nid;