xen: arm: Remove determining reset specific values from dts for XGENE.

xen: arm: Remove determining reset specific values from dts for XGENE.

This patch removes reading reset specific values (address, size and mask) from
dts and uses values defined in the code now.  This is because currently xgene
reset driver (submitted in linux) is going through a change (which is not yet
accepted), this new driver has a new type of dts bindings for reset.  Hence
till linux driver comes to some conclusion, we will use hardcoded values
instead of reading from dts so that xen code will not break due to the linux
transition.

Ref:
http://lists.xen.org/archives/html/xen-devel/2014-01/msg02256.html
http://www.gossamer-threads.com/lists/linux/kernel/1845585

Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Signed-off-by: Anup Patel <anup.patel@linaro.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>