msm: 8226/8910: make the dummy clock structure static

Both 8910 and 8226 use the same dummy clock structure in their board
files. This creates a compile time conflict due to the single binary.
Since these structures are only used with in the board files, they
can be declared static in both files.

Change-Id: I90ce3d1ffe3df48abac70ef335abc481e502e60c
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>