[PATCH] ARM/i.MX53: fix compiler warning

[Sascha Hauer]

The code wants to test if the lower 16bits of the content of
MX53_CSD0_BASE_ADDR and SDRAM_COMPARE_CONST1 are identical. The assembly
this code was derived from did:

	mov             r5, r0, lsl #16
        mov             r6, r7, lsl #16
        cmp             r5, r6

In C this is better written with masks which is better readable and
avoid this compiler warning:

arch/arm/mach-imx/esdctl-v4.c:613:63: warning: result of '305419896 << 16' requires 46 bits to represent, but 'int' only has 32 bits [-Wshift-overflow=]

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 arch/arm/mach-imx/esdctl-v4.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-imx/esdctl-v4.c b/arch/arm/mach-imx/esdctl-v4.c
index 6de4a8d6e7..b32f56d622 100644
--- a/arch/arm/mach-imx/esdctl-v4.c
+++ b/arch/arm/mach-imx/esdctl-v4.c
@@ -610,7 +610,7 @@ void imx_esdctlv4_init(void)
 	 * ok, last possibility is 16b bus on low data-lines, check that
 	 * (i.MX25 also suports 16b on high data-lines, but i.MX53 doesn't)
 	 */
-	if (readl(MX53_CSD0_BASE_ADDR) << 16 == SDRAM_COMPARE_CONST1 << 16) {
+	if ((readl(MX53_CSD0_BASE_ADDR) & 0xffff) == (SDRAM_COMPARE_CONST1 & 0xffff)) {
 		esdctl0 |= ESDCTL_V4_ESDCTLx_DSIZ_16B_LOW;
 		mask >>= 16;
 		goto sdram_bussize_found;
-- 
2.16.1