soc: qcom: bam_dmux: remove socinfo.h include

7d8468b8 incorrectly merged
1f6bc167 with
5f441c88 thus leaving an include to
socinfo.h which was intended to be removed in
1f6bc167.

Cleanup this mistake by removing the include to socinfo.h.

Change-Id: I4c4277a4acc1dd8822a4e6b6228a581347ffc7b7
Signed-off-by: Jeffrey Hugo <jhugo@codeaurora.org>