spmi: pmic_arb: remove ARM build time dependency

Qualcomm PMIC arbiter driver already depends on ARCH_QCOM,
which could be either ARM or ARM64. New version of the PMIC
arbiter controller is available on 64 bit platforms.
Remove ARM dependency to allow driver to be build for 64 bit
platforms.

Change-Id: I7279bda5bbcb3f4809f68d21ecb62b84916a49d5
Signed-off-by: Ivan T. Ivanov <ivan.ivanov@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Git-commit: 149cb911ae242242e5aae698710bf59e804a96e6
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Gilad Avidov <gavidov@codeaurora.org>