[MIPS] Mark PNX8550 support broken.

Broken in too many way for me to fix it for 2.6.17.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/Kconfig

@@ -438,11 +438,13 @@ config MIPS_XXS1500
 
 config PNX8550_V2PCI
 	bool "Philips PNX8550 based Viper2-PCI board"
+	depends on BROKEN
 	select PNX8550
 	select SYS_SUPPORTS_LITTLE_ENDIAN
 
 config PNX8550_JBS
 	bool "Philips PNX8550 based JBS board"
+	depends on BROKEN
 	select PNX8550
 	select SYS_SUPPORTS_LITTLE_ENDIAN