sparc32: fix sparse warnings in process_32.h

Fix following warnings:
process_32.c:67:6: warning: symbol 'arch_cpu_idle' was not declared. Should it be static?
process_32.c:257:16: warning: symbol 'sparc_do_fork' was not declared. Should it be static?
process_32.c:411:5: warning: symbol 'dump_fpu' was not declared. Should it be static?

Add missing includes and add one missing prototype.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/kernel/kernel.h b/arch/sparc/kernel/kernel.h
index a702d9a..a922753 100644
--- a/arch/sparc/kernel/kernel.h
+++ b/arch/sparc/kernel/kernel.h
@@ -95,6 +95,12 @@
 extern unsigned long sun4m_cpu_startup;
 extern unsigned long sun4d_cpu_startup;
 
+/* process_32.c */
+asmlinkage int sparc_do_fork(unsigned long clone_flags,
+                             unsigned long stack_start,
+                             struct pt_regs *regs,
+                             unsigned long stack_size);
+
 #else /* CONFIG_SPARC32 */
 #endif /* CONFIG_SPARC32 */
 #endif /* !(__SPARC_KERNEL_H) */