[PATCH] wanxl firware build fix

allmodconfig and allyesconfig are currently failing because they select
wanxl firmware rebuild, and that requires an m68k assembler toolchain.

Add a new generic option to the "Generic Driver Options" menu.  The option
is defaul equals y and prevents us from building firmware unless really
needed.

Firmware is usually provided in separate filer '_shipped', and there is no
need to rebuild them unless strictly required.  First user is WanXL - which
otherwise required a m68k tool-set to compile.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/base/Kconfig

 menu "Generic Driver Options"
 
+config PREVENT_FIRMWARE_BUILD
+	bool "Prevent firmware from being built"
+	default y
+	help
+	  Say yes to avoid building firmware. Firmware is usually shipped
+	  with the driver, and only when updating the firware a rebuild
+	  should be made.
+	  If unsure say Y here.
+
 config FW_LOADER
 	tristate "Hotplug firmware loading support"
 	depends on HOTPLUG

drivers/net/wan/Kconfig

@@ -248,7 +248,7 @@ config WANXL
 
 config WANXL_BUILD_FIRMWARE
 	bool "rebuild wanXL firmware"
-	depends on WANXL
+	depends on WANXL && !PREVENT_FIRMWARE_BUILD
 	help
 	  Allows you to rebuild firmware run by the QUICC processor.
 	  It requires as68k, ld68k and hexdump programs.