[MIPS] pb1000: Replace obsolete memsetup.S with lowlevel_init.S

Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>

board/pb1x00/Makefile

@@ -26,7 +26,7 @@ include $(TOPDIR)/config.mk
 LIB	= $(obj)lib$(BOARD).a
 
 COBJS	= $(BOARD).o flash.o
-SOBJS	= memsetup.o
+SOBJS	= lowlevel_init.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))

board/pb1x00/memsetup.S → board/pb1x00/lowlevel_init.S

@@ -15,8 +15,8 @@
 	.set noreorder
 	.set mips32
 
-	.globl	memsetup
-memsetup:
+	.globl	lowlevel_init
+lowlevel_init:
 	/*
 	 * Step 1) Establish CPU endian mode.
 	 * NOTE: A fair amount of code is necessary on the Pb1000 to