[U-Boot] [PATCH] video: ipu: Fix build with hard-float ARM toolchain

[Guillaume GARDET]

Build with hard-float ARM toolchain was broken by commit 3cb4f25c: 
'video: ipu: avoid overflow issue'.
To fix it, we use do_div function.

Build tested for mx6qsabrelite_defconfig.

Signed-off-by: Guillaume GARDET <guillaume.gardet at free.fr>
Cc: Peng Fan <van.freenix at gmail.com>
Cc: Sandor Yu <sandor.yu at nxp.com>
Cc: Anatolij Gustschin <agust at denx.de>
Cc: Stefano Babic <sbabic at denx.de>
Cc: Fabio Estevam <fabio.estevam at nxp.com>
Cc: Tom Rini <trini at konsulko.com>

---
 drivers/video/ipu_common.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/video/ipu_common.c b/drivers/video/ipu_common.c
index 36d4b23..e319c82 100644
--- a/drivers/video/ipu_common.c
+++ b/drivers/video/ipu_common.c
@@ -352,7 +352,8 @@ static int ipu_pixel_clk_set_rate(struct clk *clk, unsigned long rate)
 	 */
 	__raw_writel((div / 16) << 16, DI_BS_CLKGEN1(clk->id));
 
-	clk->rate = (u64)(clk->parent->rate * 16) / div;
+	do_div(parent_rate, div);
+	clk->rate = parent_rate;
 
 	return 0;
 }
-- 
1.8.4.5