qtest/fdc: Support for 2.88MB drives

The old test assumes a 1.44MB drive.
Assert that the QEMU default drive is now either 1.44 or 2.88.
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NJohn Snow <jsnow@redhat.com>
Message-id: 1453495865-9649-12-git-send-email-jsnow@redhat.com

tests/fdc-test.c

@@ -267,7 +267,7 @@ static void test_cmos(void)
     uint8_t cmos;
 
     cmos = cmos_read(CMOS_FLOPPY);
-    g_assert(cmos == 0x40);
+    g_assert(cmos == 0x40 || cmos == 0x50);
 }
 
 static void test_no_media_on_start(void)