m7: Split out BCM4335 firmware by GSM/CDMA

BCM4335B0_002.001.006.0296.xxx.hcd is specific to the GSM or CDMA
variants of this device. Move it out of common.

GSM is from m7 gpe 4.4.3-KTU84L / m7ul 6.09.401.5.
CDMA is from m7wlv 5.28.605.2 / m7wls 5.03.651.3.

Change-Id: I3e07410c7b67d10d08511bc85f67fbda7b538f1f