[media] em28xx: use the proper prefix for board names

All boards use EM28xxx_BOARD, to identify that the macro
refers to a card entry. So:

EM2874_LEADERSHIP_ISDBT -> EM2874_BOARD_LEADERSHIP_ISDBT

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/em28xx/em28xx-cards.c b/drivers/media/video/em28xx/em28xx-cards.c
index f15c734..7635a45 100644
--- a/drivers/media/video/em28xx/em28xx-cards.c
+++ b/drivers/media/video/em28xx/em28xx-cards.c
@@ -1259,7 +1259,7 @@
 		} },
 	},
 
-	[EM2874_LEADERSHIP_ISDBT] = {
+	[EM2874_BOARD_LEADERSHIP_ISDBT] = {
 		.i2c_speed      = EM2874_I2C_SECONDARY_BUS_SELECT |
 				  EM28XX_I2C_CLK_WAIT_ENABLE |
 				  EM28XX_I2C_FREQ_100_KHZ,
@@ -1937,7 +1937,7 @@
 	{0x77800080, EM2860_BOARD_TVP5150_REFERENCE_DESIGN, TUNER_ABSENT},
 	{0xc51200e3, EM2820_BOARD_GADMEI_TVR200, TUNER_LG_PAL_NEW_TAPC},
 	{0x4ba50080, EM2861_BOARD_GADMEI_UTV330PLUS, TUNER_TNF_5335MF},
-	{0x6b800080, EM2874_LEADERSHIP_ISDBT, TUNER_ABSENT},
+	{0x6b800080, EM2874_BOARD_LEADERSHIP_ISDBT, TUNER_ABSENT},
 };
 
 /* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */