tridentfb: fix memory size detection

Fix memory size multiplier during detection.
Signed-off-by: NKrzysztof Helt <krzysztof.h1@wp.pl>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/video/tridentfb.c

@@ -745,7 +745,7 @@ static unsigned int __devinit get_memsize(void)
 			switch (tmp) {
 
 			case 0x01:
-				k = 512;
+				k = 512 * Kb;
 				break;
 			case 0x02:
 				k = 6 * Mb;	/* XP */