usb: ohci: change the NUM_EDs from 8 to 32

For ohci, the maximam supported endpoint number is 32(in and out), and
now we have used (usb_pipeendpoint(pipe) << 1) to index the specified
endpoint descritor, usb_pipeendpoint(pipe) can reach 0xf, so we need
change the NUM_EDs from 8 to 32.

Signed-off-by: Zeng Tao <prime.zeng@hisilicon.com>

drivers/usb/host/ohci.h

@@ -359,7 +359,7 @@ typedef struct
 } urb_priv_t;
 #define URB_DEL 1
 
-#define NUM_EDS 8		/* num of preallocated endpoint descriptors */
+#define NUM_EDS 32		/* num of preallocated endpoint descriptors */
 
 #define NUM_TD 64		/* we need more TDs than EDs */