arm64: drop unnecessary newlines in show_regs()

There are two unnecessary newlines, one is in show_regs, another
is in __show_regs(), drop them.

Change-Id: I9514cf6f2bef079e6aeac461d4f68047dc4abbd6
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Channagoud Kadabi <ckadabi@codeaurora.org>