[PARISC] Add prototypes for flush_user_dcache_range and flush_user_icache_range

They're called from signal.c, so need to be prototyped

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>

include/asm-parisc/cacheflush.h

@@ -27,6 +27,8 @@ void flush_kernel_dcache_page_asm(void *);
 void flush_kernel_icache_page(void *);
 void flush_user_dcache_page(unsigned long);
 void flush_user_icache_page(unsigned long);
+void flush_user_dcache_range(unsigned long, unsigned long);
+void flush_user_icache_range(unsigned long, unsigned long);
 
 /* Cache flush operations */