video: valkyriefb: Fix unused variable warning in set_valkyrie_clock()

If CONFIG_ADB_CUDA=n:

drivers/video/fbdev/valkyriefb.c: In function ‘set_valkyrie_clock’:
drivers/video/fbdev/valkyriefb.c:267: warning: unused variable ‘i’
drivers/video/fbdev/valkyriefb.c:266: warning: unused variable ‘req’

Move the variable declarations inside the existing #ifdef section to fix
this.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/fbdev/valkyriefb.c

@@ -263,10 +263,10 @@ static inline int valkyrie_vram_reqd(int video_mode, int color_mode)
 
 static void set_valkyrie_clock(unsigned char *params)
 {
+#ifdef CONFIG_ADB_CUDA
 	struct adb_request req;
 	int i;
 
-#ifdef CONFIG_ADB_CUDA
 	for (i = 0; i < 3; ++i) {
 		cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_GET_SET_IIC,
 			     0x50, i + 1, params[i]);