[PATCH] Patch pvr2 driver to allow development of maple bus driver

["Adrian McMenamin" <lkmladrian@gmail.com>]

This patch makes the PVR2 VBLANK interrupt on the SEGA Dreamcast
shareable - a small but necessary change to enable ongoing efforts to
develop a driver for the maple bus on the Dreamcast. (Maple is Sega's
proprietary serial interface for the Dreamcast and can be set to
synchronise dma transfers to the VBLANK).

This has no impact on the performance of the PVR2.

Signed-off by Adrian McMenamin <adrian@mcmen.demon.co.uk>

diff --git a/drivers/video/pvr2fb.c b/drivers/video/pvr2fb.c
index 7d6c298..13de07f 100644
--- a/drivers/video/pvr2fb.c
+++ b/drivers/video/pvr2fb.c
@@ -890,7 +890,7 @@ static int __init pvr2fb_dc_init(void)
 	pvr2_fix.mmio_start	= 0xa05f8000;	/* registers start here */
 	pvr2_fix.mmio_len	= 0x2000;

-	if (request_irq(HW_EVENT_VSYNC, pvr2fb_interrupt, 0,
+	if (request_irq(HW_EVENT_VSYNC, pvr2fb_interrupt, IRQF_SHARED,
 	                "pvr2 VBL handler", fb_info)) {
 		return -EBUSY;
 	}