m7spr: 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.

This is from m7wlv 5.28.605.2 / m7wls 5.03.651.3.

Change-Id: If6f654d4f1cbb99d833620ba77e24139c5a757e8