qcom-fm: adding Qualcomm/CodeAuroraForum FM radio solution

Squashing made by Giovanni Santini <giovannisantini93@yahoo.it>.

In order to use this patch, add this flags:
BOARD_HAVE_QCOM_FM := true
COMMON_GLOBAL_CFLAGS += -DQCOM_FM_ENABLED
to your build config.

Full changelog: https://gist.github.com/ItachiSan/10104217
Code got from:  https://www.codeaurora.org/cgit/quic/la/platform/frameworks/base/log/?h=ics_chocolate&qt=grep&q=fm
Many thanks to CAF for this :D

Change-Id: I25995977d780fd2e4122d85d2959d648a870a5b7