msm: vidc: Replace ARCH_* with ARCH_MSM in Kconfig

Using ARCH_MSM as dependency will make sure the
driver builds for only MSM based targets. This
also removes the need to add new condition for every
new MSM target.

Change-Id: I94b501ce24aed80491b0b0988c2b50327e3d7762
Signed-off-by: Sachin Shah <sachins@codeaurora.org>