cfi_flash: Add interface for flash verbosity control

Add interface for flash verbosity control. It allows
to disable output from low-level flash API. It is useful
when calling these low-level functions from context other
than flash commands (for example the MTD/CFI interface
implmentation).

Signed-off-by: Piotr Ziecik <kosmo@semihalf.com>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/include/flash.h b/include/flash.h
index 8a00c2f..05fa572 100644
--- a/include/flash.h
+++ b/include/flash.h
@@ -95,6 +95,7 @@
 extern int flash_sect_protect (int flag, ulong addr_first, ulong addr_last);
 extern int flash_sect_roundb (ulong *addr);
 extern unsigned long flash_sector_size(flash_info_t *info, flash_sect_t sect);
+extern void flash_set_verbose(uint);
 
 /* common/flash.c */
 extern void flash_protect (int flag, ulong from, ulong to, flash_info_t *info);