platform: msm_shared: Fix the length mismatch of hw_subtype for device tree selection

HW subtype in SMEM is only 8bit, while the subtype is set as 16bit long in 512M device tree.
So just use the last 8bit for exact match for device tree selection.

Change-Id: I14dbcbcaa7435ebe51f29a859c40f89b707d6834
1 file changed