uboot-phytec

MLK-24157 ulp_wdog: Fix unaligned access to cs2 reg

Patch "MLK-22755 mx7ulp: wdog: Wait for WDOG unlock and
reconfiguration to complete",  added some flags checking
to WDOG driver. But the cs2 register access is wrong, should
use "readb" not "readl".

This is fine for some compilers (like gcc8.2, gcc9.2) which
adjusts the access to "ldrb" instruction. However for old
compilers (like gcc4.9), it won't fix the instruction and cause
data abort.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
(cherry picked from commit fd1f9177abdfab23ae124b8f41583c578cfe0b2e)