configure: Add the svga gallium driver to the default gallium drivers

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
diff --git a/configure.ac b/configure.ac
index e2302de..7c50e3c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -662,7 +662,7 @@
     [enable_gallium_gbm=auto])
 
 # Option for Gallium drivers
-GALLIUM_DRIVERS_DEFAULT="r300,r600,swrast"
+GALLIUM_DRIVERS_DEFAULT="r300,r600,svga,swrast"
 
 AC_ARG_WITH([gallium-drivers],
     [AS_HELP_STRING([--with-gallium-drivers@<:@=DIRS...@:>@],