Staging: sm750fb: Use ARRAY_SIZE macro

ARRAY_SIZE is more concise to use when the size of an array is divided
by the size of its first element.

Changes made using Coccinelle-

@@
type T;
T[] E;
@@

- (sizeof(E)/sizeof(E[...]))
+ ARRAY_SIZE(E)
Signed-off-by: Shraddha Barke <shraddha.6596@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/sm750fb/ddk750_chip.c

@@ -384,10 +384,10 @@ unsigned int calcPllValue(unsigned int request_orig, pll_value_t *pll)
 
 	if (pll->clockType != MXCLK_PLL) {
 		xparm = &xparm_PIXEL[0];
-		xcnt = sizeof(xparm_PIXEL) / sizeof(xparm_PIXEL[0]);
+		xcnt = ARRAY_SIZE(xparm_PIXEL);
 	} else {
 		xparm = &xparm_MXCLK[0];
-		xcnt = sizeof(xparm_MXCLK) / sizeof(xparm_MXCLK[0]);
+		xcnt = ARRAY_SIZE(xparm_MXCLK);
 	}