VIDEO: mb86r0xgdc.c: fix warning: unused variable 'i'

Fix build warning:

Configuring for jadecpu board...
mb86r0xgdc.c: In function 'dsp_init':
mb86r0xgdc.c:60: warning: unused variable 'i'

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Anatolij Gustschin <agust@denx.de>

drivers/video/mb86r0xgdc.c

@@ -57,7 +57,6 @@ static void dsp_init(struct mb86r0x_gdc_dsp *dsp, char *modestr,
 	u16 l2dx, l2dy, l2wx, l2wy, l2ww, l2wh;
 	unsigned long div;
 	int bpp;
-	u32 i;
 
 	bpp = video_get_params(&var_mode, modestr);