[Linux-stm32] [PATCH] net: stmicro: fix a missing check of clk_prepare

[David Miller]

From: Kangjie Lu <kjlu at umn.edu>
Date: Tue, 25 Dec 2018 20:57:14 -0600

> clk_prepare() could fail, so let's check its status, and if it fails,
> return its error code upstream.
> 
> Signed-off-by: Kangjie Lu <kjlu at umn.edu>

Applied.