sh: sh-bios depends on SUPERH32.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/Kconfig.debug

@@ -7,6 +7,7 @@ source "lib/Kconfig.debug"
 
 config SH_STANDARD_BIOS
 	bool "Use LinuxSH standard BIOS"
+	depends on SUPERH32
 	help
 	  Say Y here if your target has the gdb-sh-stub
 	  package from www.m17n.org (or any conforming standard LinuxSH BIOS)