vsock/test: Do not filter kallsyms by symbol type

Blamed commit implemented logic to discover available vsock transports by
grepping /proc/kallsyms for known symbols. It incorrectly filtered entries
by type 'd'.

For some kernel configs having

CONFIG_VIRTIO_VSOCKETS=m
CONFIG_VSOCKETS_LOOPBACK=y

kallsyms reports

0000000000000000 d virtio_transport [vmw_vsock_virtio_transport]
0000000000000000 t loopback_transport

Overzealous filtering might have affected vsock test suit, resulting in
insufficient/misleading testing.

Do not filter symbols by type. It never helped much.

Fixes: 3070c05b7afd ("vsock/test: Introduce get_transports()")
Signed-off-by: Michal Luczaj <[e-mail]>
Reviewed-by: Stefano Garzarella <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Paolo Abeni <[e-mail]>

tools/testing/vsock/util.h

···
 };
 
 static const char * const transport_ksyms[] = {
-	#define x(name, symbol) "d " symbol "_transport",
+	#define x(name, symbol) " " symbol "_transport",
 	KNOWN_TRANSPORTS(x)
 	#undef x
 };