usb: musb: da8xx: Add special endpoint config for ev3dev

The lms2012 software expects USB to be able to handle 1024 byte packets
on USB ep1. There is no existing configuration for this in the kernel,
so we have to add our own.

The maxpacket values come from the official LEGO firmware source code:
https://github.com/mindboards/ev3sources/blob/master/extra/linux-03.20.00.13/drivers/usb/musb/musb_core.c#L1065

Issue: ev3dev/lms2012-compat#49

Author: dlech

drivers/usb/musb/da8xx.c

@@ -498,7 +498,20 @@ static const struct platform_device_info da8xx_dev_info = {
 	.dma_mask	= DMA_BIT_MASK(32),
 };
 
+/* special config to match official LEGO firmware */
+static struct musb_fifo_cfg ev3dev_cfg[] = {
+	{ .hw_ep_num = 1, .style = FIFO_TX,   .maxpacket = 1024, },
+	{ .hw_ep_num = 1, .style = FIFO_RX,   .maxpacket = 1024, },
+	{ .hw_ep_num = 2, .style = FIFO_TX,   .maxpacket = 64 ,  },
+	{ .hw_ep_num = 2, .style = FIFO_RX,   .maxpacket = 64 ,  },
+	{ .hw_ep_num = 3, .style = FIFO_TX,   .maxpacket = 1024, },
+	/* TODO: what about ep3 FIFO_RX? */
+	{ .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 128,  },
+};
+
 static const struct musb_hdrc_config da8xx_config = {
+	.fifo_cfg	= ev3dev_cfg,
+	.fifo_cfg_size	= ARRAY_SIZE(ev3dev_cfg),
 	.ram_bits = 10,
 	.num_eps = 5,
 	.multipoint = 1,