[RESEND PATCH] arm64: kgdb: fix single stepping

[Giuseppe CAVALLARO]

Hello

[snip]

> We can avoid this issue by specifying "nokgdbroundup" in kernel parameter,
> but this will also leave other cpus be in unknown state in terms of kgdb,
> and may result in interfering with kgdb activity.

> Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org 
<http://lists.infradead.org/mailman/listinfo/linux-arm-kernel>>

Tested-by: Giuseppe Cavallaro <peppe.cavallaro at st.com>

[snip]