ARM: dts: msm: Expose NOM_L1 power level for supported devices

Create speed bins to include NOM_L1 on supported A640 devices.
Add efuse memory region to identify supported devices.

Change-Id: I794aec37f80859c6f15be6658be20b9ecde56062
Signed-off-by: Mohammed Mirza Mandayappurath Manzoor <mmandaya@codeaurora.org>