arm64: dts: qcom: msm8998: Extend TZ reserved memory area

My console locks up as soon as Linux writes to [88800000,88f00000[
AFAIU, that memory area is reserved for trustzone.

Extend TZ reserved memory range, to prevent Linux from stepping on
trustzone's toes.

Cc: stable@vger.kernel.org # 4.20+
Reviewed-by: Sibi Sankar <sibis@codeaurora.org>
Fixes: c7833949

 ("arm64: dts: qcom: msm8998: Add smem related nodes")
Signed-off-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
Signed-off-by: Andy Gross <andy.gross@linaro.org>