usb: chipidea: tegra: fix flexible_array.cocci warnings

Zero-length and one-element arrays are deprecated, see
Documentation/process/deprecated.rst
Flexible-array members should be used instead.

Generated by: scripts/coccinelle/misc/flexible_array.cocci

Fixes: fc53d527 ("usb: chipidea: tegra: Support host mode")
CC: Peter Geis <pgwipeout@gmail.com>
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: kernel test robot <lkp@intel.com>
Signed-off-by: Julia Lawall <julia.lawall@inria.fr>
Link: https://lore.kernel.org/r/alpine.DEB.2.22.394.2102132108040.2720@hadrienSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/host.c

@@ -32,7 +32,7 @@ struct ehci_ci_priv {
 struct ci_hdrc_dma_aligned_buffer {
 	void *kmalloc_ptr;
 	void *old_xfer_buffer;
-	u8 data[0];
+	u8 data[];
 };
 
 static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable)