dpkg-dev is an essential package and it's not necessary to depend on it
unless a versioned dependency is used.
Removing the dependency fixes the following lintian error:
E: libam7xxx source: depends-on-build-essential-package-without-using-version dpkg-dev [build-depends: dpkg-dev]
N:
N: The package declares a depends on a build essential package without
N: using a versioned depends. Packages do not have to build-depend on any
N: package included in build-essential. It is the responsibility of anyone
N: building packages to have all build-essential packages installed. The
N: only reason for an explicit dependency on a package included in
N: build-essential is if a particular version of that package is required,
N: in which case the dependency should include the version.
N:
N: Refer to Debian Policy Manual section 4.2 (Package relationships) for
N: details.
N:
N: Severity: important, Certainty: certain
N:
N: Check: fields, Type: binary, udeb, source
N:
Section: libdevel
Priority: optional
Maintainer: Antonio Ospite <ao2@ao2.it>
-Build-Depends: debhelper (>= 11), dpkg-dev, cmake, pkg-config,
+Build-Depends: debhelper (>= 11), cmake, pkg-config,
libusb-1.0-0-dev, libxcb1-dev,
libavdevice-dev, libavformat-dev, libavcodec-dev, libswscale-dev,
asciidoc, xmlto