staging: emxx_udc: Use min_t instead of min

Use min_t instead of min function in emxx_udc.c

Fix checkpatch.pl warnings:
WARNING: min() should probably be min_t(u32, iBufSize, ep->ep.maxpacket)
WARNING: min() should probably be min_t(u32, data_size, ep->ep.maxpacket)
WARNING: min() should probably be min_t(u16, udc->ctrl.wLength, sizeof(status_data))

Changes in v2:
 - Fixed min function call as min_t

Signed-off-by: Ebru Akagunduz <ebru.akagunduz@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>