[SPARC64]: Be like Alpha and turn on -Werror in sparc64 subdirectories.

arch/sparc64/kernel/Makefile

@@ -3,6 +3,7 @@
 #
 
 EXTRA_AFLAGS := -ansi
+CFLAGS += -Werror
 
 EXTRA_TARGETS	:= head.o init_task.o
 

arch/sparc64/lib/Makefile

@@ -3,6 +3,7 @@
 #
 
 EXTRA_AFLAGS := -ansi
+CFLAGS += -Werror
 
 L_TARGET = lib.a
 obj-y := PeeCeeI.o blockops.o debuglocks.o strlen.o strncmp.o \

arch/sparc64/mm/Makefile

@@ -3,6 +3,7 @@
 #
 
 EXTRA_AFLAGS := -ansi
+CFLAGS += -Werror
 
 obj-y    := ultra.o fault.o init.o generic.o extable.o
 

arch/sparc64/prom/Makefile

@@ -4,6 +4,7 @@
 #
 
 EXTRA_AFLAGS := -ansi
+CFLAGS += -Werror
 
 L_TARGET = lib.a
 obj-y   := bootstr.o devops.o init.o memory.o misc.o \