[U-Boot] [PATCH] arm: mmu: Add missing volatile for reading SCTLR register

[Albert ARIBAUD]

Hello Alison,

On Wed, 9 Sep 2015 10:22:02 +0800, Alison Wang <b18965 at freescale.com>
wrote:
> When building u-boot with the latest Linaro toolchain, such as
> gcc-linaro-4.9, u-boot will hang at PCIE init on LS1021A platform.
> The issue is reported on
> http://comments.gmane.org/gmane.linux.linaro.toolchain/5163.
> 
> As volatile is missing when reading SCTLR register and SCTLR is set
> according to the value read from SCTLR, it causes CR_M bit is not set.
> Then MMU is not enabled, the access to VA for PCIE fails.
> 
> This patch will add the missing volatile for reading SCTLR register.
> 
> Signed-off-by: Alison Wang <alison.wang at freescale.com>

Applied (with the commit message rewritten as discussed), thanks!

Amicalement,
-- 
Albert.