ARM: dts: msm: Change compatible string based on llcc version

Add compatible string with llcc version. This will be used to
determine the set of registers to program based on version.

Change-Id: I2949e6d2d0437cce35109b30239233276c5f3076
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>