Yeah, Same on my Z2 tablet.
I checked the Z2 phone info I could find and found enough evidence it's Broadcom FM/combo too.
Pretty much every phone with Qualcomm SOC has Qualcomm FM stuff included, whether the chip is there or not. That's part of the reason GPEs such as MotoG, Z Ultra and M8 (?) leave the FM driver there, to my benefit.
It's been common for 1-2 years now for OEMs to build "Universal ROMs" for all/many of their phones, and even more so Universal kernels. Makes the work much easier when there are many phones and variants to update.
This made the original FM and audio chip detection code in Spirit unreliable, requiring a lot of now half-broken ID tricks, LOL.
Vestigial Broadcom stuff is also common on Qualcomm FM chipped devices. On custom and AOSP ROMs as much as stock too. There are now huge numbers and phones that the most popular ROMs run on, such as CM, AOKP, and many others.
Right now there only seem to be 2 important OEMs of FM/combo chips (Besides Mediatek in the "developing world"): Qualcomm and Broadcom. TI is dead and Silicon Labs was for Samsung flagships that no longer have FM. Qualcomm has done well the last 2 years, but Broadcom started as the leader, and is making a resurgence.
On the plus side with Broadcom, I see a new libbt-fmrds.so library, that I'm hoping is a better solution than my UART and BT shim modes. Qualcomms purpose built V4L FM driver is a lot easier than trying to share FM with Bluetooth over the same comms channel.
Spec and review sites usually talk SOC only, and sometimes audio chip. It's very rare they mention the FM/combo chip, unless it's a teardown of the most popular/anticipated flagships. That's my excuse for buying a device without knowing the FM chip...
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