ensure kernel >= 5.0 is happy

dummy_hcd now checks wMaxPacketSize

Change-Id: I3ca4fa3948b5eb9995e0c9f679713ad860dd118e
diff --git a/ccid/README.linux-dummy_hcd-ffs b/ccid/README.linux-dummy_hcd-ffs
index bb628b6..2b98eff 100644
--- a/ccid/README.linux-dummy_hcd-ffs
+++ b/ccid/README.linux-dummy_hcd-ffs
@@ -2,7 +2,8 @@
 ============
 
 * you need dummy_hcd.ko, i.e. a kernel compiled with CONFIG_USB_DUMMY_HCD=m
-* you need a fixed usb_f_fs.ko, which doesn't make blind assumptions about
+* kernel version >= 5.0 does NOT require patching
+* kernel version < 5.0 needs a fixed usb_f_fs.ko, which doesn't make blind assumptions about
   everything being a HID descriptor.  See CCID.patch
 
 On a stock Debian system, this works as follows (kernel versions will change over time,