Blackfin arch: Set PB4 as the default irq for bf548 board v1.4+.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

diff --git a/arch/blackfin/mach-bf548/boards/ezkit.c b/arch/blackfin/mach-bf548/boards/ezkit.c
index d081681..309c160 100644
--- a/arch/blackfin/mach-bf548/boards/ezkit.c
+++ b/arch/blackfin/mach-bf548/boards/ezkit.c
@@ -656,7 +656,7 @@
 {
 	.modalias		= "ad7877",
 	.platform_data		= &bfin_ad7877_ts_info,
-	.irq			= IRQ_PJ11,	/* newer boards (Rev 1.4+) use IRQ_PB4 */
+	.irq			= IRQ_PB4,	/* old boards (<=Rev 1.3) use IRQ_PJ11 */
 	.max_speed_hz		= 12500000,     /* max spi clock (SCK) speed in HZ */
 	.bus_num		= 0,
 	.chip_select  		= 2,