ARM: dts: msm: Fix M4M frequency list for MSM8996V3

Commit b94b0604 ("ARM: dts: msm: Update cpufreq list and devfreq
mapping for MSM8996 V3") mistakenly listed M4M frequency in HZ. The
correct frequency list should be in kHz.

Fix the frequency list.

Change-Id: Iab0a1f2081f50046ac7bf361bccbb9d3aff2c1c8
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>