msm: smd: Move to arch_initcall()

The SMD driver is critical to the boot process of msm System on Chips
(SoC).  SMD is used as the transport to communicate resource votes (such
as clocks and regulators) to the power management processor.  This makes
SMD critical to the boot process as resource votes during boot cannot be
completed until SMD initializes. As a result, the SMD driver should be
initialized as early as possible to unblock the entire boot process.

Call SMD's init() from arch_initcall() to initialize SMD as early as
possible in boot.

Change-Id: Id60d92bcb8f9fdef0c65110e6d79bb9bd94f917e
Signed-off-by: Jeffrey Hugo <jhugo@codeaurora.org>