s390/Kconfig: make z196 the default processor type

The current default processor type is z900. The BPF jit compiler
depends on PACK_STACK && HAVE_MARCH_Z196_FEATURES. To have the
BPF jit code included in compiles with 'make allmodconfig' set
the default processor type to z196.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/Kconfig

@@ -211,7 +211,7 @@ config HAVE_MARCH_Z13_FEATURES
 
 choice
 	prompt "Processor type"
-	default MARCH_Z900
+	default MARCH_Z196
 
 config MARCH_Z900
 	bool "IBM zSeries model z800 and z900"