video: fbdev: au1200fb: delete double assignment

Delete successive assignments to the same location.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression i;
@@

*i = ...;
 i = ...;
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/fbdev/au1200fb.c

@@ -1254,7 +1254,6 @@ static void set_global(u_int cmd, struct au1200_lcd_global_regs_t *pdata)
 			pdata->brightness = 30;
 		}
 		divider = (lcd->pwmdiv & 0x3FFFF) + 1;
-		hi1 = (lcd->pwmhi >> 16) + 1;
 		hi1 = (((pdata->brightness & 0xFF)+1) * divider >> 8);
 		lcd->pwmhi &= 0xFFFF;
 		lcd->pwmhi |= (hi1 << 16);