sparc: unify kernel/init_task

A closer inspection revealed that these two files had identical
functionality - but the implementation of it differed slightly.

Base it on the sparc version as it was the best.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile
index 4643946..cd13d7f 100644
--- a/arch/sparc/kernel/Makefile
+++ b/arch/sparc/kernel/Makefile
@@ -6,7 +6,7 @@
 ccflags-y := -Werror
 
 extra-y     := head_$(BITS).o
-extra-y     += init_task_$(BITS).o
+extra-y     += init_task.o
 extra-y     += vmlinux.lds
 
 obj-$(CONFIG_SPARC32)   += entry.o wof.o wuf.o