[PATCH] MIPS: don't offer SERIAL_DZ on 64-bit DEC

From: Ralf Baechle <ralf@linux-mips.org>

Limit the DZ driver to MIPS32 as the supported hardware is only present in
R2k/R3k-based systems (unless someone sends Maciej a PMAC-A board for driver
development).

drivers/serial/Kconfig

@@ -279,7 +279,7 @@ config SERIAL_BAST_SIO
 
 config SERIAL_DZ
 	bool "DECstation DZ serial driver"
-	depends on DECSTATION
+	depends on MACH_DECSTATION && MIPS32
 	select SERIAL_CORE
 	help
 	  DZ11-family serial controllers for VAXstations, including the