libbt-vendor: Remove platform specific check

Platform specific check is not required as module compilation is
controlled by BOARD_HAVE_BLUETOOTH_QCOM.

Set BOARD_HAVE_BLUETOOTH_QCOM=true in BoardConfigVendor.mk to
enable compilation of this module.

Conflicts:
	Android.mk

Change-Id: I5d4db1f4239539290004fc09a62b5eb3b4dd03de