vrend: Increase VREND_MAX_CTX to 64.

The current default value is not big enough for running android app
inside Chrome OS under qemu+virgl. Increase it to 64 so we can run
several android apps inside ARC++ under Chrome OS in qemu+virgl at
same time.

Signed-off-by: Lepton Wu <lepton@chromium.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/vrend_decode.c

@@ -47,7 +47,7 @@ struct vrend_decode_ctx {
    struct vrend_decoder_state ids, *ds;
    struct vrend_context *grctx;
 };
-#define VREND_MAX_CTX 16
+#define VREND_MAX_CTX 64
 static struct vrend_decode_ctx *dec_ctx[VREND_MAX_CTX];
 
 static inline uint32_t get_buf_entry(struct vrend_decode_ctx *ctx, uint32_t offset)